Deep Ulnar Nerve

Muscular branch innervates two muscles in the anterior compartment of the forearm. The nerve then travels medially pierces the intermuscular septum and enters the anterior compartment of the leg.

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An ulnar nerve neuroma in continuity was identified by fusiform swelling and fibrotic nerve a.

Deep ulnar nerve

. In the forearm the ulnar nerve pierces the two heads of the flexor carpi ulnaris and travels deep to the muscle alongside the ulna. The ulnar nerve is also responsible for sensation in the fourth and fifth fingers ring and little fingers of the hand part of the palm and the underside of the forearm. Ulnar nerve compression at the wrist can be caused by a variety of intrinsic and extrinsic factors.

Zone 2 encompasses the motor branch of the nerve after it has bifurcated. On its course it is accompanied by the ulnar nerve. This nerve provides motor innervation to the vast majority of hand muscles.

The deep branch of the ulnar nerve emerges from the same region of the nerve as the superficial branch. At its origin it supplies the hypothenar muscles. Three main branches arise in the forearm.

Isolated compression of only the deep branch of ulnar nerve by a ganglion is very uncommon. Its anatomy is poorly described and its three-dimensional configuration is poorly appreciated. The deep fibular nerve is a terminal division of the common fibular nerve itself a branch of the sciatic nerve.

Ebraheims educational animated video describes a quick review anatomy of the Ulnar Nerve DistributionThe ulnar nerve runs from the brachial plexus to t. It then perforates the opponens digiti minimi and follows the course of the deep palmar arch beneath the flexor tendons. The deep motor branch of the ulnar nerve divides from the main ulnar nerve in Guyons canal and then passes just distal to the hook of the hamate covered by loose areolar tissue and fat.

Ultrasound examination can clearly show the cystic lesion compressing the nerves. It arises within the lateral compartment of the leg between the fibularis longus muscle and the neck of the fibula. Anatomically the canal is divided into three zones.

The deep branch of the ulnar nerve accompanied by the deep branch of the ulnar artery passes between the abductor digiti minimi and the flexor digiti minimi brevis. Palmar cutaneous branch innervates the medial half of the palm. Dividing the transverse carpal ligament from dis tal to proximal while identifying the hook of the ha mate as the ulnar distal margin may help with orien tation.

The ulnar nerve transmits electrical signals to muscles in the forearm and hand. The deep palmar arch lies proximal to the superficial palmar arch with which it forms an anastomosis. It courses between the muscles of the hypothenar region into the deep aspect of the plam alongside the deep palmar branch of the ulnar artery.

After resection of the traumatic neuroma 3 undamaged deep ulnar nerve fascicles were left intact but a 3 cm gap was left in the majority of the nerve b. The deep motor branch of the ulnar nerve is not frequently seen during surgery but is vulnerable to penetrating injury and may be injured during surgery. The deep palmar arch is located deep to the oblique head of adductor pollicis the tendons of flexor digitorum longus the flexor digitorum brevis and the lumbrical muscles.

The ulnar nerve divides into a superficial and deep branch within the canal. Zone 1 is the area proximal to the bifurcation of the ulnar nerve.

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