| 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) |
The nerves are grouped into five primary regions based on the segment of the spinal cord they extend from: vertebrae nerve map
5 pairs in the lower back that supply the hips, legs, and feet. | Symptom | Likely Level | |---------|--------------| |