{"id":8118,"date":"2026-02-05T11:46:17","date_gmt":"2026-02-05T10:46:17","guid":{"rendered":"https:\/\/blueportance.com\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/fascia-neural-gliding\/"},"modified":"2026-10-25T22:43:42","modified_gmt":"2026-10-25T21:43:42","slug":"fascia-neural-gliding","status":"publish","type":"page","link":"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/fascia-neural-gliding\/","title":{"rendered":"KB_Pudendal Neuralgia_05 : Fascia, Nerve Gliding, and Tissue Densification"},"content":{"rendered":"\n\n\n<style>\n  .bp-bdc-wrap {\n    max-width: 980px;\n    margin: 0 auto;\n    padding: 0 16px 48px;\n    color: #222;\n    line-height: 1.65;\n  }\n\n  .bp-bdc-breadcrumb {\n    max-width: 900px;\n    margin: 0 auto;\n    padding: 20px 16px 0;\n    font-size: .85rem;\n    color: #6b7280;\n  }\n\n  .bp-bdc-breadcrumb a {\n    color: #2a7fba;\n    text-decoration: none;\n  }\n\n  .bp-bdc-breadcrumb a:hover {\n    text-decoration: underline;\n  }\n\n  .bp-bdc-hero {\n    max-width: 900px;\n    margin: 30px auto 0;\n  }\n\n  .bp-bdc-hero h1 {\n    margin-bottom: 18px;\n    line-height: 1.2;\n  }\n\n  .bp-bdc-meta {\n    margin-top: 22px;\n    padding: 12px 16px;\n    background: #f4f8fb;\n    border-left: 4px solid #2a7fba;\n    color: #52606d;\n    font-size: .9rem;\n  }\n\n  .bp-bdc-toc {\n    max-width: 900px;\n    margin: 34px auto;\n    padding: 22px 26px;\n    background: #f7fafc;\n    border: 1px solid #e1e8ee;\n    border-radius: 10px;\n  }\n\n  .bp-bdc-toc h2 {\n    margin-top: 0;\n  }\n\n  .bp-bdc-toc a {\n    color: #1e73be;\n  }\n\n  .bp-bdc-content {\n    max-width: 900px;\n    margin: 0 auto;\n  }\n\n  .bp-bdc-content h2 {\n    margin-top: 48px;\n    padding-bottom: 8px;\n    border-bottom: 2px solid #d9e8f5;\n    line-height: 1.3;\n  }\n\n  .bp-bdc-content h3 {\n    margin-top: 32px;\n    line-height: 1.35;\n  }\n\n  .bp-bdc-content p {\n    margin: 0 0 18px;\n  }\n\n  .bp-figure {\n    margin: 30px auto;\n    padding: 0;\n    text-align: center;\n  }\n\n  .bp-figure img,\n  .bp-figure svg {\n    display: block;\n    width: 100%;\n    height: auto;\n    margin: 0 auto;\n  }\n\n  .bp-figure img {\n    max-width: 900px;\n  }\n\n  .bp-figure figcaption {\n    margin-top: 12px;\n    color: #59636e;\n    font-size: .92rem;\n    text-align: left;\n  }\n\n  .bp-box {\n    margin: 24px 0;\n    padding: 20px 24px;\n    border-radius: 10px;\n  }\n\n  .bp-box--info {\n    background: #f4f8fb;\n    border: 1px solid #d9e8f5;\n  }\n\n  .bp-box--warning {\n    background: #fff8ed;\n    border: 1px solid #f2c078;\n  }\n\n  .bp-bdc-navigation {\n    margin-top: 44px;\n    padding: 22px 24px;\n    background: #f7fafc;\n    border: 1px solid #e1e8ee;\n    border-radius: 10px;\n  }\n\n  .bp-bdc-navigation a {\n    color: #1e73be;\n  }\n\n  .bp-bdc-footer {\n    margin-top: 28px;\n    padding: 18px 20px;\n    background: #fff8ed;\n    border-left: 4px solid #f39c12;\n    font-size: .92rem;\n  }\n\n  .bp-bdc-copyright {\n    font-size: .85em;\n    color: #6b7280;\n    margin-top: 22px;\n  }\n\n  .bp-reference-note {\n    color: #59636e;\n    font-size: .9rem;\n  }\n\n  .bp-bdc-level {\n    display: inline-block;\n    margin: 0 6px 6px 0;\n    padding: 3px 8px;\n    border-radius: 999px;\n    background: #eaf3f9;\n    color: #245f85;\n    font-size: .78rem;\n    font-weight: 700;\n    letter-spacing: .02em;\n  }\n<\/style>\n\n<nav class=\"bp-bdc-breadcrumb\" aria-label=\"Breadcrumb\">\n<a href=\"\/en\/\">Blue Portance<\/a> \u2192 <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/\">Knowledge Base<\/a> \u2192 <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/\">Sitting-Related Pain<\/a> \u2192 <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/\">Pudendal Neuralgia<\/a> \u2192 Fascia and Nerve Gliding\n<\/nav>\n\n<section class=\"bp-bdc-wrap\">\n\n  <header class=\"bp-bdc-hero\">\n    <h1>Fascia, Nerve Gliding, and Tissue Densification<\/h1>\n\n    <p>\n      In the contemporary approach to pudendal neuralgia, understanding pain\n      mechanisms cannot be limited to searching for a direct, permanent\n      compression. Pain may be present even when no structural lesion\n      is identified on available diagnostic testing. This situation does not rule\n      out nerve dysfunction, sensitization, or mechanical irritation, but neither\n      does it, on its own, allow clinicians to identify a specific fascial\n      mechanism.\n    <\/p>\n\n    <p>\n      This page offers a clinical and functional reading of the possible role\n      of fascial interfaces in the mechanical regulation of the pudendal nerve.\n      It examines nerve gliding as a physiological property of the nervous\n      system, and fascial densification as a model that may explain certain\n      changes in relative mobility between tissues.\n    <\/p>\n\n    <p>\n      The argument distinguishes three levels: the general mechanical role of\n      fascial interfaces and nerve gliding, the plausible consequences of a\n      change in these interfaces, and then their hypothetical application to\n      the pudendal nerve. This distinction preserves the explanatory scope of\n      the model without inferring an individual mechanism from the mere\n      presence of pain.\n    <\/p>\n\n    <div class=\"bp-bdc-meta\">\n      Blue Portance Knowledge Base \u00b7 Non-commercial reproduction permitted with citation of the source\n    <\/div>\n  <\/header>\n\n  <nav class=\"bp-bdc-toc\" aria-label=\"Table of contents\">\n    <h2>Table of Contents<\/h2>\n    <ul>\n      <li>\n        <a href=\"#fascia-role\">\n          1. Fascia as a functional mechanical medium\n        <\/a>\n      <\/li>\n      <li>\n        <a href=\"#glissement\">\n          2. Neurodynamics: gliding as a functional property\n        <\/a>\n      <\/li>\n      <li>\n        <a href=\"#densification\">\n          3. Fascial densification and possible loss of relative mobility\n        <\/a>\n      <\/li>\n      <li>\n        <a href=\"#alcock\">\n          4. Alcock&#8217;s canal: anatomical course and zone of vulnerability\n        <\/a>\n      <\/li>\n      <li>\n        <a href=\"#chronicisation\">\n          5. Transition to chronic pain: interactions between pain, posture, and adaptation\n        <\/a>\n      <\/li>\n      <li>\n        <a href=\"#references\">\n          Scientific References\n        <\/a>\n      <\/li>\n    <\/ul>\n  <\/nav>\n\n  <article class=\"bp-bdc-content\">\n\n    <section id=\"fascia-role\">\n      <h2>1. Fascia as a functional mechanical medium<\/h2>\n\n      <p>\n        <span class=\"bp-bdc-level\">TISSUE MECHANICS<\/span>\n        <span class=\"bp-bdc-level\">INTERFACES<\/span>\n      <\/p>\n\n      <p>\n        The pelvic fascial system contributes to the mechanical organization of\n        the relationships between neural, muscular, and bony structures. It is\n        not merely a passive anatomical envelope. Its mechanical properties may\n        influence the transmission, redistribution, and dissipation of stress\n        between the different tissue planes.\n      <\/p>\n\n      <p>\n        From a clinical and functional standpoint, the relevance of fascia does\n        not lie solely in its morphological appearance. It also lies in the\n        possibility of relative movement between the tissues it separates or\n        connects. This relative mobility may contribute to a nerve&#8217;s ability to\n        adapt to movements of the pelvis and hip and to changes in posture.\n      <\/p>\n\n      <p>\n        The interface between the nerve and the surrounding tissues is therefore\n        a relevant biomechanical element. It may be influenced by the\n        organization of connective tissues, by local movements, by muscle\n        tension, and by variations in pressure. However, the existence of a\n        mechanical interface does not, on its own, justify concluding that a\n        pathological entrapment is present.\n      <\/p>\n\n      <p>\n        Fascia thus fulfills a dual mechanical function: it provides a\n        continuity that allows forces to be transmitted, while maintaining\n        planes of relative mobility that prevent each movement from being\n        transmitted in full to the nerve. Continuity and gliding are not in\n        opposition; their combination allows stress to be redistributed and\n        dissipated within a mobile tissue system.\n      <\/p>\n\n      <p>\n        The concept of fascial &#8220;entrapment neuropathy&#8221; describes the hypothesis\n        that changes in the connective-tissue microenvironment surrounding a\n        nerve may reduce its mechanical independence from adjacent tissues. This\n        concept is general and does not constitute a specific demonstration\n        concerning the pudendal nerve or Alcock&#8217;s canal\n        (Stecco, Pirri &amp; Stecco, 2019).\n      <\/p>\n    <\/section>\n\n    <section id=\"glissement\">\n      <h2>2. Neurodynamics: gliding as a functional property<\/h2>\n\n      <p>\n        <span class=\"bp-bdc-level\">PHYSIOLOGICAL PROPERTY<\/span>\n        <span class=\"bp-bdc-level\">MECHANICAL READING<\/span>\n      <\/p>\n\n      <p>\n        Nerve gliding refers to a nerve&#8217;s ability to change its position\n        relative to the surrounding tissues during movement. This property is\n        part of the mechanical continuity of the nervous system, which must\n        adapt to the variations in length, path, and tension induced by body\n        movements (Butler, 2000).\n      <\/p>\n\n      <p>\n        When relative mobility is sufficient, mechanical variations can be\n        better distributed among the different segments of the nervous system\n        and the adjacent interfaces. This capacity for adaptation does not mean\n        that the nerve is free of stress. Rather, it means that stress can\n        remain compatible with the mechanical tolerance of the tissue.\n      <\/p>\n\n      <p>\n        Gliding is therefore not an incidental movement that the nerve could\n        simply lose without mechanical consequence. It contributes to the\n        nerve&#8217;s ordinary adaptation to changes in posture. In the SBNFA\u2122 framework,\n        the margin of displacement and strain still available constitutes a\n        <strong>mobility reserve<\/strong>: it allows a change in length or path\n        to be distributed across several segments rather than concentrated on a\n        single interface.\n      <\/p>\n\n      <p>\n        Conversely, reduced relative mobility may theoretically alter the\n        distribution of stress. Ordinary actions such as sitting down,\n        straightening up, or walking may then become less well tolerated in\n        some people. This situation may locally increase tensile, shear, or\n        compressive loading.\n      <\/p>\n\n      <p>\n        The functional consequence is not necessarily immobility of the nerve,\n        but a <strong>reduction in mechanical options<\/strong>: less relative\n        displacement, more local strain, or faster stress concentration. This\n        formulation links gliding to tolerance without presuming the existence\n        of an adhesion or a compression.\n      <\/p>\n\n      <p>\n        However, movement-dependent pain should not automatically be equated\n        with a loss of nerve gliding. Such an interpretation must be weighed\n        against the clinical examination, the symptom course, and the\n        other factors that may alter the sensitivity of the nervous system.\n      <\/p>\n    <\/section>\n\n    <section id=\"densification\">\n      <h2>3. Fascial densification and possible loss of relative mobility<\/h2>\n\n      <p>\n        <span class=\"bp-bdc-level\">DOCUMENTED MODEL<\/span>\n        <span class=\"bp-bdc-level\">PUDENDAL APPLICATION TO BE VALIDATED<\/span>\n      <\/p>\n\n      <h3>3.1 Moving beyond the opposition between local pain and radiating pain<\/h3>\n\n      <p>\n        In pudendal neuralgia, the opposition between local pain and radiating\n        pain is often insufficient to describe the diversity of clinical\n        presentations. Symptoms may vary with posture, the duration of exposure\n        to sitting, physical activity, and the repetition of mechanical load.\n      <\/p>\n\n      <p>\n        The Nantes criteria provide a reference clinical framework for guiding\n        the diagnosis of pudendal neuralgia. The five essential criteria include\n        pain in the anatomical territory of the pudendal nerve, worsening in\n        the sitting position, no nighttime awakening due to pain, no objective\n        sensory deficit, and improvement after an anesthetic pudendal nerve\n        block (Labat et al., 2008).\n      <\/p>\n\n      <p>\n        These criteria are useful for characterizing a clinical syndrome. They\n        do not, on their own, demonstrate fascial involvement, a loss of nerve\n        gliding, or a permanent anatomical compression. They must therefore be\n        distinguished from the biomechanical models proposed to explain certain\n        variations in symptoms.\n      <\/p>\n\n      <h3>3.2 What is fascial densification?<\/h3>\n\n      <p>\n        In the model proposed by Pavan et al. (2014), densification refers to a\n        change in the mechanical properties of loose connective tissue, notably\n        its viscosity and its gliding capacity. It must be distinguished from\n        fibrosis, which corresponds to a more structural change in the\n        organization and quantity of collagen.\n      <\/p>\n\n      <p>\n        Densification should therefore not automatically be equated with a\n        scar, an irreversible adhesion, or established fibrosis. It is a model\n        of tissue change that may impair relative movement between planes. Its\n        clinical significance and its reversibility may depend on the context,\n        the duration of mechanical stress, inflammation, mechanical load, and\n        individual factors (Pavan et al., 2014).\n      <\/p>\n\n      <p>\n        Changes in the extracellular matrix, in the viscosity of connective\n        tissue, and in collagen organization may theoretically influence\n        friction and gliding between tissue planes. However, there is no\n        justification for presenting a universal, proven sequence that\n        systematically runs from dehydration to densification and then to\n        fibrosis.\n      <\/p>\n\n      <p>\n        Densification is therefore better understood as a <strong>change in\n        mechanical regime<\/strong> than as a mandatory step toward an\n        irreversible lesion. It can serve as a hypothesis when mobility between\n        planes appears less available, while remaining distinct from fibrosis\n        and without being assertable in a given patient on the basis of\n        symptoms alone.\n      <\/p>\n\n      <figure class=\"bp-figure\">\n        <svg\n          xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n          viewBox=\"0 0 980 450\"\n          width=\"100%\"\n          height=\"auto\"\n          role=\"img\"\n          aria-label=\"Functional model illustrating the difference between preserved gliding, densification, and tissue stiffening\">\n\n          <rect x=\"0\" y=\"0\" width=\"980\" height=\"450\" fill=\"#ffffff\"\/>\n\n          <text\n            x=\"30\"\n            y=\"40\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"18\"\n            fill=\"#222\"\n            font-weight=\"700\">\n            Relative mobility between tissue planes\n          <\/text>\n\n          <text\n            x=\"30\"\n            y=\"85\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"15\"\n            fill=\"#222\">\n            <tspan font-weight=\"700\">1)<\/tspan>\n            Preserved gliding\n          <\/text>\n\n          <rect\n            x=\"30\"\n            y=\"100\"\n            width=\"560\"\n            height=\"90\"\n            rx=\"14\"\n            fill=\"#fbfdff\"\n            stroke=\"#d9e8f5\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"60\"\n            y=\"122\"\n            width=\"500\"\n            height=\"12\"\n            rx=\"6\"\n            fill=\"#e9f3ff\"\n            stroke=\"#1e73be\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"60\"\n            y=\"156\"\n            width=\"500\"\n            height=\"12\"\n            rx=\"6\"\n            fill=\"#e9f3ff\"\n            stroke=\"#1e73be\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"60\"\n            y=\"138\"\n            width=\"500\"\n            height=\"14\"\n            rx=\"7\"\n            fill=\"#f2fbff\"\n            stroke=\"#9ad0f5\"\n            stroke-width=\"2\"\n            stroke-dasharray=\"6 6\"\/>\n\n          <text\n            x=\"75\"\n            y=\"149\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"12\"\n            fill=\"#1e73be\">\n            mobile interface\n          <\/text>\n\n          <text\n            x=\"610\"\n            y=\"145\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"14\"\n            fill=\"#222\">\n            Mechanical adaptation:\n          <\/text>\n\n          <path\n            d=\"M750 122 C800 112, 860 112, 910 122 L910 134 C860 144, 800 144, 750 134 Z\"\n            fill=\"#e9f3ff\"\n            stroke=\"#1e73be\"\n            stroke-width=\"2\"\/>\n\n          <path\n            d=\"M750 156 C800 146, 860 146, 910 156 L910 168 C860 178, 800 178, 750 168 Z\"\n            fill=\"#e9f3ff\"\n            stroke=\"#1e73be\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"750\"\n            y=\"138\"\n            width=\"160\"\n            height=\"14\"\n            rx=\"7\"\n            fill=\"#f2fbff\"\n            stroke=\"#9ad0f5\"\n            stroke-width=\"2\"\n            stroke-dasharray=\"6 6\"\/>\n\n          <text\n            x=\"750\"\n            y=\"196\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"12\"\n            fill=\"#555\">\n            relative mobility preserved\n          <\/text>\n\n          <text\n            x=\"30\"\n            y=\"245\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"15\"\n            fill=\"#222\">\n            <tspan font-weight=\"700\">2)<\/tspan>\n            Possible densification\n          <\/text>\n\n          <rect\n            x=\"30\"\n            y=\"260\"\n            width=\"560\"\n            height=\"90\"\n            rx=\"14\"\n            fill=\"#fbfdff\"\n            stroke=\"#d9e8f5\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"60\"\n            y=\"282\"\n            width=\"500\"\n            height=\"12\"\n            rx=\"6\"\n            fill=\"#e9f3ff\"\n            stroke=\"#1e73be\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"60\"\n            y=\"316\"\n            width=\"500\"\n            height=\"12\"\n            rx=\"6\"\n            fill=\"#e9f3ff\"\n            stroke=\"#1e73be\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"60\"\n            y=\"298\"\n            width=\"500\"\n            height=\"14\"\n            rx=\"7\"\n            fill=\"#f2fbff\"\n            stroke=\"#9ad0f5\"\n            stroke-width=\"2\"\n            stroke-dasharray=\"6 6\"\/>\n\n          <line\n            x1=\"140\"\n            y1=\"294\"\n            x2=\"160\"\n            y2=\"316\"\n            stroke=\"#777\"\n            stroke-width=\"3\"\/>\n\n          <line\n            x1=\"260\"\n            y1=\"294\"\n            x2=\"280\"\n            y2=\"316\"\n            stroke=\"#777\"\n            stroke-width=\"3\"\/>\n\n          <line\n            x1=\"380\"\n            y1=\"294\"\n            x2=\"400\"\n            y2=\"316\"\n            stroke=\"#777\"\n            stroke-width=\"3\"\/>\n\n          <line\n            x1=\"500\"\n            y1=\"294\"\n            x2=\"520\"\n            y2=\"316\"\n            stroke=\"#777\"\n            stroke-width=\"3\"\/>\n\n          <text\n            x=\"610\"\n            y=\"305\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"14\"\n            fill=\"#222\">\n            Possible effect:\n          <\/text>\n\n          <path\n            d=\"M750 282 C800 278, 860 278, 910 282 L910 294 C860 298, 800 298, 750 294 Z\"\n            fill=\"#e9f3ff\"\n            stroke=\"#1e73be\"\n            stroke-width=\"2\"\/>\n\n          <path\n            d=\"M750 316 C800 312, 860 312, 910 316 L910 328 C860 332, 800 332, 750 328 Z\"\n            fill=\"#e9f3ff\"\n            stroke=\"#1e73be\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"750\"\n            y=\"298\"\n            width=\"160\"\n            height=\"18\"\n            rx=\"9\"\n            fill=\"#fff6ee\"\n            stroke=\"#f39c12\"\n            stroke-width=\"2\"\/>\n\n          <text\n            x=\"760\"\n            y=\"312\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"12\"\n            fill=\"#a86100\">\n            less free movement\n          <\/text>\n\n          <text\n            x=\"30\"\n            y=\"385\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"15\"\n            fill=\"#222\">\n            <tspan font-weight=\"700\">3)<\/tspan>\n            Possible structural stiffening\n          <\/text>\n\n          <rect\n            x=\"30\"\n            y=\"400\"\n            width=\"560\"\n            height=\"38\"\n            rx=\"14\"\n            fill=\"#ffffff\"\n            stroke=\"#d9e8f5\"\n            stroke-width=\"2\"\/>\n\n          <rect\n            x=\"60\"\n            y=\"410\"\n            width=\"500\"\n            height=\"18\"\n            rx=\"9\"\n            fill=\"#f0f0f0\"\n            stroke=\"#999\"\n            stroke-width=\"2\"\/>\n\n          <path\n            d=\"M70 419 C120 400, 170 438, 220 419 C270 400, 320 438, 370 419 C420 400, 470 438, 520 419\"\n            fill=\"none\"\n            stroke=\"#777\"\n            stroke-width=\"3\"\/>\n\n          <text\n            x=\"610\"\n            y=\"425\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"14\"\n            fill=\"#222\">\n            Possible effect:\n          <\/text>\n\n          <rect\n            x=\"750\"\n            y=\"408\"\n            width=\"160\"\n            height=\"24\"\n            rx=\"12\"\n            fill=\"#ffe7cc\"\n            stroke=\"#f39c12\"\n            stroke-width=\"2\"\/>\n\n          <text\n            x=\"760\"\n            y=\"425\"\n            font-family=\"Arial, sans-serif\"\n            font-size=\"12\"\n            fill=\"#a86100\">\n            reduced adaptation\n          <\/text>\n        <\/svg>\n\n        <figcaption>\n          <strong>Functional model of relative mobility.<\/strong>\n          Densification here refers to a possible change in the mechanical\n          properties of connective tissue and should not automatically be\n          confused with structural fibrosis. The diagram presents a conceptual\n          progression, not a mandatory biological sequence\n          (Pavan et al., 2014).\n        <\/figcaption>\n      <\/figure>\n\n      <h3>3.3 Possible consequences for the pudendal nerve<\/h3>\n\n      <p>\n        A change in fascial interfaces may influence the mechanical environment\n        of the neural structures that pass through or run alongside them.\n        When relative mobility decreases, postural variations may be less well\n        distributed among the tissues. A local increase in friction, shear, or\n        tension then becomes theoretically possible.\n      <\/p>\n\n      <p>\n        The pudendal nerve runs through an anatomically complex region, in\n        relation to the pelvic ligaments, the muscles, and the obturator\n        internus fascia. This anatomical proximity may contribute to mechanical\n        vulnerability in some patients, but it is not sufficient to demonstrate\n        fascial involvement in an individual case (Robert et al., 1998).\n      <\/p>\n\n      <p>\n        To place these interfaces within the nerve&#8217;s full course, see\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/pudendal-nerve-anatomy\/\">\n          Functional Anatomy and Neuromechanics of the Pudendal Nerve\n        <\/a>, as well as\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/mechanical-locks\/\">\n          Mechanical Vulnerability and Pudendal Nerve Entrapment Mechanisms\n        <\/a>.\n      <\/p>\n\n      <p>\n        Neuropathic pain may therefore be compatible with a mechanical\n        disturbance without a visible lesion. It may also result from other\n        peripheral or central mechanisms. It is therefore preferable to speak of\n        a possible loss of mechanical compatibility between the nerve and its\n        environment rather than asserting that densification is the sole cause\n        of the pain.\n      <\/p>\n\n      <div class=\"bp-bdc-box bp-bdc-box--soft\">\n\n        <strong>Proposed functional chain<\/strong>\n\n        <p>\n          Possible change in interface properties \u2192 less available relative\n          mobility \u2192 more limited stress redistribution \u2192 local loading\n          potentially less well tolerated. The first three relationships\n          constitute a plausible mechanical model; their presence along the\n          pudendal course and their contribution to symptoms remain to be\n          established on an individual basis.\n        <\/p>\n\n      <\/div>\n    <\/section>\n\n    <section id=\"alcock\">\n      <h2>\n        4. Alcock&#8217;s canal: anatomical course and zone of vulnerability\n      <\/h2>\n\n      <p>\n        <span class=\"bp-bdc-level\">ESTABLISHED ANATOMY<\/span>\n        <span class=\"bp-bdc-level\">DYNAMIC INTERFACE<\/span>\n      <\/p>\n\n      <h3>4.1 An anatomical structure, not necessarily a pathological tunnel<\/h3>\n\n      <p>\n        Alcock&#8217;s canal, also called the pudendal canal, is a passage formed by\n        a splitting of the obturator internus fascia. The pudendal nerve and\n        its vessels run through it in the lateral region of the pelvic wall.\n      <\/p>\n\n      <p>\n        The anatomical work of Robert et al. identified several potential\n        entrapment sites along the course of the pudendal nerve,\n        notably at the pudendal canal and the falciform process.\n        These observations establish an anatomical basis for understanding\n        certain forms of entrapment, but they do not mean that the canal is a\n        zone of pathological compression in all patients (Robert et al., 1998).\n      <\/p>\n\n      <p>\n        A strictly anatomical reading, which would equate every instance of\n        pudendal pain with permanent pinching in a rigid tunnel, is therefore\n        insufficient. Symptoms also depend on the sensitivity of the nervous\n        system, exposure to mechanical stress, posture, and the neuromuscular\n        context.\n      <\/p>\n\n      <h3>4.2 An interface that may adapt to movement<\/h3>\n\n      <p>\n        The pudendal canal can be viewed as an anatomical interface within\n        which the nerve must adapt to the movements and tension variations of\n        the surrounding tissues. This adaptation probably involves several\n        mechanical degrees of freedom, but the available data do not allow the\n        canal to be described as a protective structure demonstrated under all\n        conditions.\n      <\/p>\n\n      <p>\n        It nonetheless remains mechanically relevant not to represent it as an\n        inert tunnel. The canal guides a neurovascular bundle within an\n        environment linked to the obturator internus muscle: the nerve, the\n        vessels, the fascia, and the neighboring tissues must therefore retain\n        compatibility of movement. The term <strong>dynamic interface<\/strong>\n        describes this functional requirement without attributing to the canal\n        a specific protective function that has not been demonstrated.\n      <\/p>\n\n      <p>\n        Tissue densification, muscle hypertonia, a change in local pressure, or\n        repeated postural loading could influence this interface. These\n        mechanisms must, however, be formulated as functional hypotheses or\n        possible contributing factors, not as established causality for all\n        cases of pudendal neuralgia.\n      <\/p>\n\n      <figure class=\"bp-figure\">\n        <img decoding=\"async\"\n          src=\"https:\/\/blueportance.com\/wp-content\/uploads\/IMG_NP_Alcoks-canal.jpg\"\n          alt=\"Alcock's canal and the course of the pudendal nerve within its fascial environment\"\n          loading=\"lazy\">\n\n        <figcaption>\n          <strong>Alcock&#8217;s canal and the environment of the pudendal nerve.<\/strong>\n          The pudendal canal is an anatomical passage in which the nerve may be\n          exposed to various mechanical stresses. The image does not, on its\n          own, justify concluding that compression, densification, or a loss of\n          gliding exists in a given patient\n          (Robert et al., 1998).\n        <\/figcaption>\n      <\/figure>\n\n      <h3>4.3 A posture-dependent vulnerability<\/h3>\n\n      <p>\n        The sitting position is one of the important clinical elements in the\n        Nantes criteria, since worsening in the sitting position is one of the\n        essential criteria for pudendal neuralgia (Labat et al., 2008).\n        This clinical observation does not, however, demonstrate a single\n        mechanism. It may reflect the interaction between pressure, pelvic\n        posture, muscle tension, tissue load, and nerve sensitivity.\n      <\/p>\n\n      <p>\n        Pain may vary with the duration of exposure to a posture and with\n        changes in position. These variations are compatible with a functional\n        mechanical vulnerability, but they do not allow clinicians to locate\n        the responsible structure with certainty, nor to distinguish\n        compression, irritation, sensitization, or a combination of several\n        mechanisms.\n      <\/p>\n\n      <p>\n        Alcock&#8217;s canal can thus be considered an anatomical point where several\n        mechanical influences become clinically relevant. It is preferable to\n        describe it as a potential zone of vulnerability rather than as an\n        autonomous, systematic cause of pudendal neuralgia.\n      <\/p>\n\n      <p>\n        This approach also helps explain why the same anatomy may be well\n        tolerated in one person and painful in another. The differences may\n        involve nerve sensitivity, daily mechanical loads, tissue adaptive\n        capacity, muscle coordination, and clinical history.\n      <\/p>\n\n      <p>\n        In SBNFA\u2122, vulnerability appears when the stresses related to\n        posture, their duration, and their repetition exceed this interface&#8217;s\n        capacity for variation, gliding, and recovery. This is a model of loss\n        of mechanical compatibility, not proof of densification or compression\n        in Alcock&#8217;s canal.\n      <\/p>\n    <\/section>\n\n    <section id=\"chronicisation\">\n      <h2>\n        5. Transition to chronic pain: interactions between pain, posture, and adaptation\n      <\/h2>\n\n      <p>\n        <span class=\"bp-bdc-level\">MULTIFACTORIAL MODEL<\/span>\n        <span class=\"bp-bdc-level\">SBNFA\u2122 HYPOTHESIS<\/span>\n      <\/p>\n\n      <h3>5.1 A mechanical regime that may persist<\/h3>\n\n      <p>\n        Chronicity in pudendal neuralgia cannot be explained solely by\n        progressive anatomical worsening. In some patients, the persistence of\n        symptoms may reflect the interaction between repeated exposure to\n        mechanical stress, nerve sensitivity, avoidance behaviors, sleep\n        disturbances, muscle tension, and psychosocial factors.\n      <\/p>\n\n      <p>\n        Prolonged sitting may represent a significant mechanical load when it\n        reproduces or amplifies the symptoms. The duration of exposure, the\n        workstation setup, the distribution of pressure, and the opportunity to\n        change position may influence individual tolerance.\n      <\/p>\n\n      <p>\n        It has not been established, however, that a reduction in postural\n        micro-variations systematically leads to fascial densification or\n        fibrosis. This relationship should be presented as a biomechanical\n        hypothesis to be investigated, not as a proven physiological law.\n      <\/p>\n\n      <h3>5.2 Possible feedback loops<\/h3>\n\n      <p>\n        Pain may induce a protective strategy and increased tension in certain\n        muscles. This response may alter load distribution and reduce certain\n        local movements. In turn, reduced activity or the repetition of\n        protective postures may help maintain sensitivity and functional\n        limitation.\n      <\/p>\n\n      <p>\n        This loop should not be understood as a simple, one-directional\n        relationship. Pain can increase muscle tension, but muscle tension is\n        not necessarily the initial cause of the pain. Likewise, the presence of\n        muscle tension does not justify concluding that the pudendal nerve is\n        compressed.\n      <\/p>\n\n      <p>\n        The fascial model proposes that a change in the connective-tissue\n        microenvironment could reduce relative mobility between a nerve and the\n        adjacent tissues. This model is relevant for generating clinical\n        hypotheses, but it should not be presented as proof that pudendal pain\n        stems from &#8220;adaptive fibrosis&#8221; in every case\n        (Stecco, Pirri &amp; Stecco, 2019; Pavan et al., 2014).\n      <\/p>\n\n      <p>\n        The loss of nerve mechanical tolerance in the pudendal nerve can\n        therefore be viewed as the possible result of an imbalance between\n        mechanical stress, the adaptive capacity of the tissues, and the\n        sensitivity of the nervous system. This formulation helps\n        integrate the biomechanical and neurophysiological dimensions without\n        reducing chronicity to a single lesion.\n      <\/p>\n\n      <p>\n        The functional loop can be formulated without assuming a mandatory\n        histological progression: pain \u2192 muscle guarding and reduction of\n        available movements \u2192 lower variability of mechanical stress \u2192\n        more difficult recovery \u2192 lowered tolerance threshold \u2192 earlier onset\n        of pain. Each of these relationships may vary from one person to\n        another and be modulated by non-mechanical factors.\n      <\/p>\n\n      <figure class=\"bp-figure\">\n        <img decoding=\"async\"\n          src=\"https:\/\/blueportance.com\/wp-content\/uploads\/pudendal-neuralgia-functional-architecture-chronicization.png\"\n          alt=\"Functional model of the interactions between posture, pain, muscle tension, and tissue adaptation in pudendal neuralgia\"\n          loading=\"lazy\">\n\n        <figcaption>\n          <strong>Functional model of the interactions that may contribute\n          to the transition to chronic pain.<\/strong>\n          Pain persistence may involve an interaction between exposure to\n          mechanical stress, pain, muscle guarding, reduced activity, and nerve\n          sensitivity. Fascial densification and loss of gliding are possible\n          biomechanical hypotheses, but they have not been demonstrated in all\n          patients.\n        <\/figcaption>\n      <\/figure>\n\n      <h3>5.3 Why this reading changes the conceptual approach to management<\/h3>\n\n      <p>\n        This model helps explain why normal imaging does not rule out\n        significant symptoms. Structural examinations may fail to identify\n        certain functional changes, certain phenomena of nerve sensitivity, or\n        certain posture-dependent interactions.\n      <\/p>\n\n      <p>\n        Conversely, normal imaging does not prove the existence of a fascial\n        mechanism. Rather, it calls for interpreting the findings in relation\n        to the clinical examination, the history of the symptoms, the\n        provoking factors, and the responses to changes in load or posture.\n      <\/p>\n\n      <p>\n        A functional strategy may therefore seek to reduce aggravating\n        mechanical stress, improve postural variability, progressively restore\n        movement capacity, and take into account the sensitivity of the nervous\n        system. These principles do not constitute a personalized therapeutic\n        recommendation and must be adapted by qualified professionals.\n      <\/p>\n\n      <p>\n        Functional observation then focuses less on searching for &#8220;hidden\n        fibrosis&#8221; than on how tolerance evolves: time before symptoms appear,\n        number of positions still available, ability to vary support points,\n        and time needed to recover. An improvement in these indicators suggests\n        a greater functional margin; it does not demonstrate an anatomical\n        change in the fascia.\n      <\/p>\n\n      <p>\n        Chronicity can thus be understood as the result of lasting\n        interactions between mechanical, neuromuscular, and neurophysiological\n        factors. This reading is more cautious than a model based on a single\n        compression or on systematic fibrosis.\n      <\/p>\n\n      <p>\n        The complementary role of hypersensitivity is developed in\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/wandering-central-sensitization\/\">\n          The Diagnostic Odyssey and Central Sensitization in Pudendal Neuralgia\n        <\/a>.\n      <\/p>\n    <\/section>\n\n    <section id=\"references\">\n      <h2>Scientific References<\/h2>\n\n      <div class=\"bp-box bp-box--info\">\n        <ol>\n          <li>\n            Butler DS.\n            <em>The Sensitive Nervous System<\/em>.\n            Adelaide: Noigroup Publications; 2000.\n          <\/li>\n\n          <li>\n            Labat JJ, Riant T, Robert R, Amarenco G, Lefaucheur JP, Rigaud J.\n            Diagnostic criteria for pudendal neuralgia by pudendal nerve entrapment\n            (Nantes criteria).\n            <em>Neurourology and Urodynamics<\/em>.\n            2008;27(4):306\u2013310.\n            doi:\n            <a href=\"https:\/\/doi.org\/10.1002\/nau.20505\" target=\"_blank\" rel=\"noopener\">\n              10.1002\/nau.20505\n            <\/a>.\n          <\/li>\n\n          <li>\n            Pavan PG, Stecco A, Stern R, Stecco C.\n            Painful connections: densification versus fibrosis of fascia.\n            <em>Current Pain and Headache Reports<\/em>.\n            2014;18(8):441.\n            doi:\n            <a href=\"https:\/\/doi.org\/10.1007\/s11916-014-0441-4\" target=\"_blank\" rel=\"noopener\">\n              10.1007\/s11916-014-0441-4\n            <\/a>.\n          <\/li>\n\n          <li>\n            Robert R, Prat-Pradal D, Labat JJ, Bensignor M, Raoul S, Rebai R,\n            Leborgne J.\n            Anatomic basis of chronic perineal pain: role of the pudendal nerve.\n            <em>Surgical and Radiologic Anatomy<\/em>.\n            1998;20(2):93\u201398.\n            doi:\n            <a href=\"https:\/\/doi.org\/10.1007\/BF01628908\" target=\"_blank\" rel=\"noopener\">\n              10.1007\/BF01628908\n            <\/a>.\n          <\/li>\n\n          <li>\n            Stecco A, Pirri C, Stecco C.\n            Fascial entrapment neuropathy.\n            <em>Clinical Anatomy<\/em>.\n            2019;32(7):883\u2013890.\n            doi:\n            <a href=\"https:\/\/doi.org\/10.1002\/ca.23388\" target=\"_blank\" rel=\"noopener\">\n              10.1002\/ca.23388\n            <\/a>.\n          <\/li>\n        <\/ol>\n\n        <p class=\"bp-reference-note\">\n          The references above are used to support general anatomical,\n          clinical, or conceptual points. They do not demonstrate that fascial\n          densification, fibrosis, or a loss of gliding is the cause of every\n          case of pudendal neuralgia.\n        <\/p>\n      <\/div>\n\n      <div class=\"bp-box bp-box--warning\">\n        <strong>Internal document:<\/strong>\n        the SBNFA\u2122 framework \u2014 <em>Neuro-anatomie, partie V<\/em> [Neuroanatomy, Part V] \u2014 may be cited\n        as a proprietary document or internal Blue Portance reference framework.\n        It must not be presented as a peer-reviewed scientific\n        publication.\n      <\/div>\n    <\/section>\n\n    <div class=\"bp-bdc-navigation\">\n      <strong>Pudendal Neuralgia Pathway<\/strong>\n      <p>\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/pudendal-nerve-anatomy\/\">1. Functional Anatomy and Neuromechanics of the Pudendal Nerve<\/a><br>\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/mechanical-locks\/\">2. Mechanical Vulnerability and Pudendal Nerve Entrapment Mechanisms<\/a><br>\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/referred-pain-trident\/\">3. Referred Pain and the Pudendal Trident: Understanding Symptom Territories<\/a><br>\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/structural-functional-triage\/\">4. SBNFA\u2122 Triage: Distinguishing Structural Factors from Functional Mechanisms<\/a><br>\n        <strong>5. Fascia, Nerve Gliding, and Tissue Densification<\/strong><br>\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/wandering-central-sensitization\/\">6. The Diagnostic Odyssey and Central Sensitization in Pudendal Neuralgia<\/a>\n      <\/p>\n      <p>\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/structural-functional-triage\/\">\u2190 Previous article<\/a> \u00b7\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/wandering-central-sensitization\/\">Next article \u2192<\/a>\n      <\/p>\n    <\/div>\n\n    <div class=\"bp-bdc-navigation\">\n      <strong>Navigation<\/strong>\n      <p>\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/pudendal-neuralgia\/\">\n          \u2190 Back to the Pudendal Neuralgia hub\n        <\/a>\n        <br>\n\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/expert-guides\/sitting-related-pain\/\">\n          \u2190 See the topic: Sitting-Related Pain\n        <\/a>\n        <br>\n\n        <a href=\"https:\/\/blueportance.com\/en\/knowledge-base\/\">\n          \u2190 Explore the Knowledge Base\n        <\/a>\n      <\/p>\n    <\/div>\n\n    <footer class=\"bp-bdc-footer\">\n      <strong>Note:<\/strong>\n      this content aims to present possible anatomical, clinical, and\n      functional mechanisms. It does not constitute a medical diagnosis, a\n      therapeutic recommendation, or proof that a fascial mechanism alone\n      explains pudendal pain.\n    <\/footer>\n\n    <p class=\"bp-bdc-copyright\">\n      \u00a9 Gil Ayache. The concepts, diagrams, terminology, and principles presented on this page constitute a work protected by copyright. They are made available to Blue Portance under an intellectual property license agreement, without transfer of economic rights or of authorship.\n    <\/p>\n\n  <\/article>\n\n<\/section>\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Blue Portance \u2192 Knowledge Base \u2192 Sitting-Related Pain \u2192 Pudendal Neuralgia \u2192 Fascia and Nerve Gliding Fascia, Nerve Gliding, and Tissue Densification In the contemporary approach to pudendal neuralgia, understanding pain mechanisms cannot be limited to searching for a direct, permanent compression. Pain may be present even when no structural lesion is identified on available [&#8230;]\n","protected":false},"author":6,"featured_media":0,"parent":8099,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_yoast_wpseo_title":"Pudendal Nerve Gliding and Fascia | Blue Portance","_yoast_wpseo_metadesc":"Fascia, nerve gliding and tissue densification in pudendal neuralgia: established data and SBNFA\u2122 hypotheses.","footnotes":""},"pathologie_secondaire":[],"effet_positif":[],"class_list":["post-8118","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pudendal Nerve Gliding and Fascia | Blue Portance<\/title>\n<meta name=\"description\" content=\"Fascia, nerve gliding and tissue densification in pudendal neuralgia: established data and SBNFA\u2122 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