Patients with neck pain may have difficulty with spreading their fingers apart.
Abduction movement consists of spreading the fingers apart from one another away from the axis of the middle finger.
Abduction of the fingers is made possible by the contraction of:
- the dorsal interossei muscles supplied by the deep branch of the on the nerve.
- lumbrical muscles the first and second lumbrical muscles are supplied by the median nerve and the third and fourth lumbricals are supplied by the deep branch of the ulnar nerve.
- abductor digiti minimi supplied by ulnar nerve.
All these muscles are supplied by the C8 and T1 nerve roots.