[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-563965-105":53,"doc-detail-563965-en":127},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":120,"head_meta":122,"extra_data":124,"updated_unix":126},105,"en","dermatome-reference-chart","Dermatome Reference Chart","","Dermatome Reference Chart explains how skin sensation patterns map to specific spinal nerve roots from C2 to S5. It describes how numbness, tingling, or pain often reflect compression or irritation of a matching root, and why overlapping zones mean clinicians must interpret overall patterns across several regions. It provides root-to-skin-area charts for cervical, thoracic, lumbar, and sacral levels, plus common compression signs. It also includes clinical red flags like saddle numbness with bowel or bladder changes, and guidance on using the chart alongside MRI/CT/X-ray and EMG.",{"@graph":63,"@context":119},[64,80,102],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":51,"@type":70,"position":76},"https://docshare.wps.com/template/general/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/dermatome-reference-chart/563965/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/dermatome-reference-chart/563965.png","ImageObject",442,249,{"name":88,"@type":89},"Jordan Avery","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-28","2026-10-12",true,{"@type":98,"interactionType":99,"userInteractionCount":101},"InteractionCounter",{"@type":100},"ViewAction",7,{"@type":103,"mainEntity":104},"FAQPage",[105,111,115],{"name":106,"@type":107,"acceptedAnswer":108},"What is a dermatome and how does it relate to spinal nerve roots?","Question",{"text":109,"@type":110},"A dermatome is a skin area that receives sensation from a single spinal nerve root. The chart maps sensation patterns from C2 at the back of the head down to S5 at the perineum.","Answer",{"name":112,"@type":107,"acceptedAnswer":113},"Why do dermatome zones overlap, and why does pattern matter more than one point?",{"text":114,"@type":110},"Skin areas receive fibers from more than one nerve root, so a single root injury often does not create a sharply bordered numb region. Symptoms blur across neighboring zones, making the overall pattern the key diagnostic clue.",{"name":116,"@type":107,"acceptedAnswer":117},"What clinical red flag is highlighted in the sacral region (S3–S5)?",{"text":118,"@type":110},"Numbness in the saddle area (S3 to S5) together with new bowel or bladder trouble can signal cauda equina syndrome. It is described as a surgical emergency requiring immediate medical care.","https://schema.org",{"og:url":78,"og:type":121,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":123,"canonical":78},"index,follow",{"doc_id":125,"site_id":56},563965,1792091460,{"code":4,"msg":5,"data":128},{"doc_id":125,"user_id":129,"nickname":88,"user_avatar":130,"doc_module":9,"category_id":50,"category_name":51,"doc_title":59,"doc_description":61,"doc_content":131,"file_id":132,"file_url":133,"file_type":134,"file_size":135,"view_count":101,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":73,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":9},1099523882367,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Dermatome Reference Chart  \nSpinal nerve root map of the body, C2 to S5  \nProf. Dr. Bertagnoli  \nMD , Spine Surgeon and Biomechanical Engineer and Researcher  \nA dermatome is an area of skin that takes its sensation from a single spinal nerve root. The body has 30 of them , running from C2 at the back of the head down to S5 at the perineum.  \nWhen one of these zones feels numb , tingly, or painful , it usually points back to compression or irritation of the matching nerve root in the spine. Clinicians read the pattern across several zones , then confirm the level with imaging such as MRI , CT, or X-ray, along with EMG or nerve conduction studies where needed.  \nWhy the zones overlap: every patch of skin is fed by fibres from more than one nerve root , so a single root injury rarely leaves a sharply bordered numb area. Symptoms tend to blur into the neighbouring zones , which is why the overall pattern matters more than any single point.  \n\n| SPINAL REGIONS |  |  |\n| --- | --- | --- |\n| neck\u003Cbr>trunk\u003Cbr>low back\u003Cbr>pelvis |  C  C2–C8  T  T1–T12  L  L1–L5 S S1–S5\u003Cbr>|  |\n\nCervical C2–C8  \nHead, neck, shoulders, arms, and hands  \nThoracic T1–T12  \nChest, upper back, and abdomen in bands  \nLumbar L1–L5  \nLower back, hips, front of thighs, inner legs  \nSacral S1–S5  \nBack of legs, feet, buttocks, and perineum  \n\n|  C2–C8  Cervical Dermatomes\u003Cbr>Compression here , often a disc or bone spur, sends pain or numbness into the arm. |  |  |\n| --- | --- | --- |\n| ROOT | SKIN AREA | COMMON SIGNS OF COMPRESSION |\n| C2 | Back of the head and upper neck | Occipital headache , numbness over the scalp |\n| C3 | Lower neck and upper shoulders | Neck pain , numbness along the collar line |\n| C4 | Upper shoulders and top of the chest | Shoulder pain , numbness across the shoulder \"cape\" |\n| C5 | Outer shoulder and upper arm | Deltoid pain , weakness of the shoulder and biceps |\n| C6 | Outer forearm , thumb , index finger | Thumb numbness , weak biceps and wrist extension |\n| C7 | Middle finger and back of the forearm | Most commonly compressed cervical root. Triceps weakness , middle finger numbness |\n| C8 | Ring and little finger, inner forearm | Weak grip , numbness in the small fingers |\n\n\n|  T1–T12  Thoracic Dermatomes\u003Cbr>Radiculopathy is uncommon here , but the landmarks are clinically reliable. |  |  |\n| --- | --- | --- |\n| ROOT | SKIN AREA | LANDMARK |\n| T1 | Inner forearm and inner upper arm | Medial arm line |\n| T2– T3 | Upper chest and armpit | Axilla |\n| T4 | Across the chest at the nipples | Nipple line |\n| T6 | Lower breastbone | Xiphoid process |\n| T10 | Level of the navel | Umbilicus (belly button) |\n| T12 | Just above the groin crease and pubic area | Inguinal region |\n\nQuick landmarks: T4 at the nipple , T6 at the xiphoid , and T10 at the navel are the levels clinicians use to read sensory height after a suspected spinal cord injury.  \nDermatome Reference Chart · Prof. Dr. Bertagnoli Page 1 of 2  \n\n|  L1–L5  Lumbar Dermatomes\u003Cbr>The most common site of nerve root compression , and what most people call \"sciatica\". |  |  |\n| --- | --- | --- |\n| ROOT | SKIN AREA | COMMON SIGNS OF COMPRESSION |\n| L1 | Groin and very upper thigh | Groin numbness , weak hip flexion |\n| L2 | Front of the upper thigh | Pain across the front of the thigh , weak hip flexion |\n| L3 | Front of the mid thigh and inner knee | Quadriceps weakness , numbness over the front of the thigh |\n| L4 | Inner shin , inner ankle , inner foot | Quadriceps weakness , reduced knee reflex , inner shin numbness |\n| L5 | Outer shin , top of the foot , big toe | Foot drop , weak big toe lift , numbness on top of the foot |\n\nL4 to L5 and L5 to S1 are the two levels where lumbar discs herniate most often , so L5 and S1 radiculopathy account for the majority of lumbar nerve root cases.  \n\n|  S1–S5  Sacral Dermatomes\u003Cbr>Cover the back of the legs , the sole and outer foot , the buttocks , and the perineum. |  |  |\n| --- | --- | --- |\n| ROOT | SKIN AREA | COMMON SIGNS OF COMPRESSION |\n","cbCaiasIn75pS5bs","https://ap.wps.com/l/cbCaiasIn75pS5bs","pdf",133491,"English","# Dermatome overview\n## Dermatomes, sensation, and nerve root compression\n## Overlap and diagnostic interpretation\n# Cervical dermatomes (C2–C8)\n## Common signs of compression\n# Thoracic dermatomes (T1–T12)\n## Landmarks used clinically\n# Lumbar dermatomes (L1–L5)\n## Common signs of compression and sciatica\n# Sacral dermatomes (S1–S5)\n## Saddle numbness and cauda equina red flag\n# Clinical use of the chart\n## Distinguishing related conditions\n## Dermatome vs myotome","[{\"question\":\"What is a dermatome and how does it relate to spinal nerve roots?\",\"answer\":\"A dermatome is a skin area that receives sensation from a single spinal nerve root. The chart maps sensation patterns from C2 at the back of the head down to S5 at the perineum.\"},{\"question\":\"Why do dermatome zones overlap, and why does pattern matter more than one point?\",\"answer\":\"Skin areas receive fibers from more than one nerve root, so a single root injury often does not create a sharply bordered numb region. Symptoms blur across neighboring zones, making the overall pattern the key diagnostic clue.\"},{\"question\":\"What clinical red flag is highlighted in the sacral region (S3–S5)?\",\"answer\":\"Numbness in the saddle area (S3 to S5) together with new bowel or bladder trouble can signal cauda equina syndrome. It is described as a surgical emergency requiring immediate medical care.\"}]","Dermatome Reference Chart | PDF",1791839597]