In Ulnar nerve injury of arm, all of the following are seen, EXCEPT:
The ulnar nerve is most vulnerable near the elbow where it curves posteriorly around the medial epicondyle. The chief motor disability from palsy is loss of the finer intrinsic motions of the hand. Inspection will show an abduction deformity of the little finger from paralysis of the interossei, interosseous muscle wasting, and paial claw hand from interphalangeal flexion deformities of the ring and little fingers.Claw Hand--Klumpke Paralysis: An LMN lesion at the brachial plexus or ulnar nerve produces paralysis of the intrinsic hand muscles results in the claw hand. Sensation on the ulnar aspect of the arm, forearm, and hand may be lost. Ref: LeBlond R.F., DeGowin R.L., Brown D.D. (2009). Chapter 14. The Neurologic Examination. In R.F. LeBlond, R.L. DeGowin, D.D. Brown (Eds), DeGowin's Diagnostic Examination, 9e.
Hypothenar atrophy
Adduction of thumb
Loss of sensation of medial 1/3 of the hand
Claw hand