[Plate 402, Cutaneous Innervation of Upper Limb]Dermatomes
Band-like areas of skin
Each supplied by a single spinal nerve through dorsal and ventral rami
Arranged in segmental fashion
Cutaneous innervation of the upper limb
Follows segmental arrangement of spinal nerve contributions to the brachial plexus
No representation of C7 on anterior aspect of arm and forearm
No representation of T1 on palmar or dorsal surface of hand