Palmar cutaneous branch of the median nerve
The palmar cutaneous nerve is a branch of the median nerve.
|Palmar cutaneous branch of the median nerve|
|Innervation:||Lateral palmar skin|
|Search for Palmar cutaneous branch of the median nerve in Gray's.|
The nerve originates proximal to the flexor retinaculum, piercing it (or the deep fascia) to divide into two branches.
- The medial branch supplies the skin of the central palm.
- The lateral branch supplies the skin of the thumb and thenar eminence.
- Ulnar nerve
- Palmar cutaneous branch of the ulnar nerve - medial branch
- Lateral cutaneous nerve of the forearm - lateral branch
- Helps to determine the level of a median nerve injury; loss of sensation in the lateral palm may indicate a high lesion, whilst intact sensation with loss of function in the recurrent and palmar digital branches may indicate a more distal lesion e.g. in the carpal tunnel (this is not entirely reliable due to the anatomical variations).
- Communications with the ulnar nerve may not be present, or may arise from the anterior interosseous nerve.