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Cutaneous innervation of the upper limb
The patterns of cutaneous sensory nerve distribution
o The clavicle is an S-shaped long bone, which forms part of the pectoral girdle
o It articulates proximally with the sternum and distally with the acromion of scapula
o Bony features include:

Acromial facet
CUTANEOUS NERVES
Supraclavicular nerve
Superior lateral cutaneous nerve of the arm
Intercostobrachial nerve
Cutaneous branches of the Radial nerve
-inferior lateral cutaneous nerve of forearm
-posterior cutaneous nerve of forearm
Lateral cutaneous nerve of forearm,
Which in the arm is called the
Medial cutaneous nerve of the arm
Medial cutaneous nerve of the forearm
Medial cutaneous nerve of the forearm
Palmar cutaneous branch of
the RADIAL NERVE
Palmar cutaneous branch
of the MEDIAN NERVE
Palmar cutaneous branch of
the ULNAR NERVE
Sensory innervation of the ring finger
PALMAR SIDE:
two halves:
Palmar cutaneous branch of
o radial half supplied by the MEDIAN NERVE (palmar cutaneous branch)
the RADIAL NERVE
o ULNAR half supplied by the ULNAR NERVE (palmar cutaneous branch)
DORSAL SIDE:
Three parts:
o Whole ULNAR side: supplied by the ULNAR nerve (palmar cutaneous branch)
o Proximal RADIAL half : supplied by the RADIAL nerve
(palmar cutaneius branch, from the superficial branch)
o Distal radial side: MEDIAN NERVE (palmar cutaneous branch)
Palmar cutaneous branch
of the MEDIAN NERVE
Palmar cutaneous branch of
the ULNAR NERVE
References: Moore’s Clinically Oriented Anatomy 5th edition