Patients with neck pain may have weakness of the hand due to pain and spasm of muscles of the hand.
Finger adduction involves bringing the fingers tightly and close toward each other. In a normal situation, if a piece of paper is placed in between the fingers and if these muscles are strong, you will not be able to pull the paper out from between the fingers.
The muscles responsible for finger adduction are:
- palmar interossei muscles supplied by the deep branch of the ulnar nerve (C8, T1).