It arises from the medial cord of the brachial plexus.

Ulnar nerve interruption:

On the basis of site of compression
Neck:
Ulnar nerve can be interrupt at the neck:
o   Thoracic inlet syndrome
o   Diseases of the cervical spine
o   Brachial plexus abnormalities
Elbow:
Ulnar nerve may be interrupt at the elbow due to fracture, cubital tunnel syndrome, growth plate injuries.
Wrist:
Ulnar nerve can be interrupted at the wrist due to fracture, Guyon’s syndrome etc
Ulnar neuropathy may occur due to infection, tumor, rheumatism, alcoholism, diabetes

Signs and symptoms

·         Paresthesia in little finger usually on the palmer side
·         Loss of co – ordination in the finger (making fist)
·         Muscles wasting
·         Claw hand deformity
·         Numbness
·         Decreased sensation
·         Pain
·         Tingling sensation

Diagnosis:

·         NCS
·         EMG
·         Blood tests for other causative agents
·         Nerve stretch test
·         Biopsy for cancer

Treatment:

·         Positioning (splints)
·         ROM
PNF