click below
click below
Normal Size Small Size show me how
Dermotomes
| Nerve Root | Dermatome Pattern | Myotome |
|---|---|---|
| C1 | vertex of skull | forward neck flexion |
| C2 | temple, forehead & occiput | forward neck flexion |
| C3 | neck & under mandible | side neck flexion |
| C4 | shoulder, clavicle & upper scapula areas | shoulder elevation |
| C5 | deltoid area & anterolateral limb up to base of thumb | shoulder abduction |
| C6 | lateral limb, radial hand & thumb & index fingers | elbow flexion and/or wrist extension |
| C7 | posterior limb & index, middle & ring fingers | elbow extension and/or wrist flexion |
| C8 | medial limb & ring & little fingers | ulnar deviation and/or thumb extension |
| T1 | anteromedial limb up to base of little finger | finger abduction and/or adduction |
| T2 | medial arm & axilla | n/a |
| T4, T5 | upper thorax & nipple line | n/a |
| T10, T11 | abdomen & lumbar area & umbilicus | n/a |
| T12 | back over the trochanter & groin area | n/a |
| L2 | back & anterior thigh | hip flexion |
| L3 | back & upper buttock, anterior thigh & knee & medial leg | knee extension |
| L4 | medial buttock, lateral thigh, medial leg, dorsum of foot & great toe | ankle dorsiflexion |
| L5 | buttock, posterolateral thigh, lateral leg, dorsum of foot, medial sole & 3 digits | great toe extension |