This website contains age-restricted materials. If you are over the age of 18 years or over the age of majority in the location from where you are accessing this website by entering the website you hereby agree to comply with all the TERMS AND CONDITIONS
By clicking on the “Agree” button, and by entering this website you acknowledge and agree that you are not offended by nudity and explicit depictions of sexual activity.
⚠️ – A single vertebral body may not exactly correspond to the same-numbered nerve root (e.g., C7 nerve exits above C7 vertebra; T1 nerve exits below T1 vertebra).
⚠️ – Upper limbs (C5–T1) and lower limbs (L2–S3) have migrated from original segments. vertebrae nerve map
⚠️ – Especially in lower thoracic/lumbar spine (e.g., L4 nerve root compression may occur at T12–L1 level). 4. Example Clinical Correlations | Symptom | Likely Level | |---------|--------------| | Numbness in thumb/index finger | C6 | | Loss of knee jerk reflex | L4 | | Numbness over medial foot & unable to heel-walk | L5 | | Numbness over lateral foot & unable to tiptoe | S1 | | Saddle anesthesia + urinary retention | Cauda equina syndrome (L5–S4) | 5. Summary The vertebrae-nerve map is a powerful clinical tool for diagnosing nerve root disorders, but it must be used with knowledge of anatomical variability and overlap . It is most reliable in the mid-cervical and mid-lumbar regions; caution is needed in transitional zones (C7–T2, L5–S2) and in the presence of congenital anomalies or prior surgery. Would you like a visual chart, a printable table, or more detail on a specific spinal level (e.g., lumbar radiculopathy patterns)? ⚠️ – A single vertebral body may not
Apra Shy Updates
⚠️ – A single vertebral body may not exactly correspond to the same-numbered nerve root (e.g., C7 nerve exits above C7 vertebra; T1 nerve exits below T1 vertebra).
⚠️ – Upper limbs (C5–T1) and lower limbs (L2–S3) have migrated from original segments.
⚠️ – Especially in lower thoracic/lumbar spine (e.g., L4 nerve root compression may occur at T12–L1 level). 4. Example Clinical Correlations | Symptom | Likely Level | |---------|--------------| | Numbness in thumb/index finger | C6 | | Loss of knee jerk reflex | L4 | | Numbness over medial foot & unable to heel-walk | L5 | | Numbness over lateral foot & unable to tiptoe | S1 | | Saddle anesthesia + urinary retention | Cauda equina syndrome (L5–S4) | 5. Summary The vertebrae-nerve map is a powerful clinical tool for diagnosing nerve root disorders, but it must be used with knowledge of anatomical variability and overlap . It is most reliable in the mid-cervical and mid-lumbar regions; caution is needed in transitional zones (C7–T2, L5–S2) and in the presence of congenital anomalies or prior surgery. Would you like a visual chart, a printable table, or more detail on a specific spinal level (e.g., lumbar radiculopathy patterns)?
