Hand-nerves - Gross anatomy of upper limb - Dr G Bhanu Prakash PDF

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Gross anatomy of upper limb - Dr G Bhanu Prakash...

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Hand: Nerves

The ulnar nerve enters the hand medial to the pisiform bone then immediately branches into a deep and superficial branch. The superficial branch of the ulnar nerve supplies the palmaris brevis muscle. The deep branch of the ulnar nerve provides motor innervation to most muscles of the hand: - Hypothenar muscles - Dorsal interossei

- Palmar interossei - Medial 2 lumbricals (3 and 4) - Adductor pollicis Within the hand, the ulnar nerve provides sensory innervation to the skin over the medial palm, and palmar and dorsal aspects of the little finger and medial half of the ring finger. Proximal to the carpal tunnel the median nerve gives off a palmar (superficial) branch. After passing through the carpal tunnel, the median nerve gives off a recurrent branch and multiple digital branches. The palmar and digital branches of the median nerve provide sensory innervation to: - Skin over the lateral palm, minus a small portion innervated by the radial nerve. - Skin over the palmar aspect of the lateral half of the ring finger and lateral 3 fingers. - Skin over the dorsal aspect of the distal phalanges of the lateral 3 fingers and lateral half of the ring finger. Digital branches of the median nerve also innervate the lateral 2 lumbricals (1 and 2). The recurrent branch of the median nerve innervates the thenar muscles.

A superficial branch from the radial nerve enters the hand passing over the anatomical snuff box. Provides sensory innervation to: - Dorsolateral palm - Dorsal aspect of the lateral palm - Dorsal aspect of the lateral 3.5 fingers minus the distal phalanges...