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| Skin | Muscles (and stretch reflexes) | ||
| C2 | Occipital region of head | ||
| C5 | Tip of shoulder
(The top of the shoulder is in the C4 dermatome) | ||
| C5-C6 | Flexion of elbow (Biceps jerk) | ||
| C6 | Thumb | ||
| C7-C8 | Extension of elbow (Triceps jerk) | ||
| C8 | Little finger | C8-T1 | Small muscles of hand
Oppose thumb to fingers; hold piece of paper between adjacent fingers |
| T4-T5 | Nipple | ||
| T10 | Umbilicus | ||
| L3 | Front of knee | L2-L3 | Quadriceps (Knee jerk) |
| L5 | Big toe | ||
| S1 | Little toe, heel | S1-S2 | Calf muscles (Ankle jerk) |
| S3 and below | Genitalia and anal area | ||
Back to Anatomical Foundations of Neuroscience
Go back to John Kiernan's home page.
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Last updated: January 2003