What would an injury to the ulnar nerve cause?
Matthew Wilson
Updated on May 26, 2026
Ulnar nerve entrapment can cause pain, numbness and tingling in the forearm and the fourth and fifth fingers. In severe cases, ulnar nerve entrapment can cause weakness in the hand and loss of muscle mass.
What happens if the ulnar nerve is damaged?
The ulnar nerve is what creates the shock-like sensation when you hit the funny bone in your elbow. You may lose sensation and have muscle weakness in your hand if you damage your ulnar nerve. This is known as ulnar nerve palsy or ulnar neuropathy.
What causes paralysis of the hands?
Causes and Risk Factors of Hand Paralysis Nerve compression. Nerve damage. Diabetes. Stroke.
What causes nerve damage in wrist?
Nerve injury in the hand or wrist Injury to nerves in the hand or wrist is often caused by trauma, such as the area being cut, overstretched, crushed or burned, damaging the nerve or nerve ending.
What does the ulnar nerve supply?
The deep branch of the ulnar nerve innervates the three hypothenar muscles, the two medial lumbricals, the seven interrosei, the adductor pollicis and the deep head of the flexor pollicis brevis. It supplies all intrinsic hand muscles which lie medial to the flexor pollicis except the last lateral two lumbricals.
Does ulnar nerve damage cause claw hand?
Damage to the nerves can occur in the arm or hand from injuries or diseases. Cervical spondylosis, ulnar nerve palsy, and ulnar nerve entrapment are all conditions that can cause nerve damage leading to claw hand.
Where is the ulnar nerve located in the wrist?
At the wrist, the ulnar nerve lies just lateral to the pisiform bone. The superficial branch of the ulnar nerve supplies and passes under the Palmaris brevis muscles and divides into palmar digital nerves.
What is ulnar entrapment?
Ulnar nerve entrapment occurs when the ulnar nerve in the arm becomes compressed or irritated. The ulnar nerve is one of the three main nerves in your arm. It travels from your neck down into your hand, and can be constricted in several places along the way, such as beneath the collarbone or at the wrist.