What are the two main nerves that innervate the palm of the hand?

The palm is primarily innervated by the ulnar nerve and the median nerve. The ulnar nerve is the main motor nerve, while the median nerve is the main sensory nerve.

What does the ulnar nerve do in the hand?

The ulnar nerve provides motor control to most intrinsic hand muscles, such as the hypothenar muscles, interossei, adductor pollicis, and some lumbricals. It also supplies sensation to the medial palm and fingers.

What is Guyon’s tunnel syndrome?

Guyon’s tunnel syndrome is compression of the ulnar nerve in Guyon’s canal, leading to sensory loss in the medial 1½ fingers and weakness of intrinsic hand muscles.

What does the median nerve do in the hand?

The median nerve controls motor functions like the thenar muscles and first two lumbricals. It provides sensation to the lateral palm and palmar surface of the lateral 3½ digits.

How does the ulnar nerve enter the palm?

The ulnar nerve enters the palm superficial to the flexor retinaculum, between the pisiform bone and ulnar artery, before dividing into superficial and deep branches.

What is the course of the deep branch of the ulnar nerve?

The deep branch passes between the abductor and flexor digiti minimi muscles, pierces the opponens digiti minimi, and travels laterally through the deep palm to innervate muscles.

What structures does the median nerve pass through in the palm?

The median nerve passes through the carpal tunnel deep to the flexor retinaculum, accompanied by nine tendons (FDS, FDP, FPL), and then divides into lateral and medial branches.

Hand Nerves – Median & Ulnar Nerve in the Palm

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