Ulnar nerve

Question 1

Site of entrapment

Answer 1

Elbow (cubital tunnel)

Wrist

Question 2

Elbow

Answer 2

Cubital tunnel syndrome:
– formed by- tendinous arch joining the humeral and ulnar heads of the flexor carpi ulnas
—- so inflammation of the flexor carpi ulnas may compress the ulnar nerve

– compression due to fractures at medial epicondyle, or sustained pressure and/or abnormalities in the ancones muscle

Signs and symptoms:
– weakness of wrist flexion (ulnar side)
– claw hand deformity with normal PROM
– loss of sensation to medial 1.5 fingers

Question 3

Wrist (Tunnel of Guyon) ‘medial to carpal tunnel’

Answer 3

Made up of:
– extends between the proximal border of the pisiform bone and distally at the hook of hamate

Wounds from cuts or stabs or other trauma

repeated impact from riding a bicycle without padded gloves

Signs and symptoms:
– bishops or claw hand deformity with normal PROM
– loss of sensation to medial fingers with normal PROM