Version June 2024
| Area of sensory loss | Level |
| Cervical spine | |
| Supraclavicular fossa | C3 |
| Top of acromioclavicular point | C4 |
| Lateral antecubital fossa | C5 |
| Thumb | C6 |
| Middle finger | C7 |
| Little finger | C8 |
| Thoracic spine | |
| Ulnar side of antecubital fossa | T1 |
| Apex of axilla | T2 |
| Fourth intercostal space (nipple line) | T4 |
| Tenth intercostal space (umbilicus) | T10 |
| Midpoint of inguinal ligament | T12 |
| Lumbar spine | |
| Halfway between T12 and L2 | L1 |
| Mid-anterior thigh | L2 |
| Medial femoral condyle | L3 |
| Medial malleolus | L4 |
| Dorsum of third metatarsophalangeal joint | L5 |
| Sacral spine | |
| Lateral heel | S1 |
| Midline popliteal fossa | S2 |
| Ischial tuberosity | S3 |
| Perianal | S4-5 |
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