Paralysis of the Ulnar Nerve

Incomplete paralysis of the ulnar nerve: Mild. Slight weakness of intrinsic hand muscles (interossei, hypothenar muscles); mild sensory deficit in ring and little fingers; grip strength slightly reduced.

Moderate; 30

Incomplete paralysis of the ulnar nerve: Moderate. Significant weakness of intrinsic hand muscles with beginning "claw hand" deformity; impaired fine motor control; moderate sensory loss over medial hand and fingers 4-5.

Incomplete paralysis of the ulnar nerve: Severe. Marked intrinsic muscle atrophy and weakness; severe "claw hand" deformity affecting 4th and 5th fingers; significant impairment of hand function; complete sensory loss in ulnar distribution.

Complete; the “griffin claw” deformity, due to flexor contraction of ring and little fingers, atrophy very marked in dorsal interspace and thenar and hypothenar eminences; loss of extension of ring and little fingers cannot spread the fingers (or reverse), cannot adduct the thumb; flexion of wrist weakened; 60

Complete paralysis of the ulnar nerve: Total loss of intrinsic hand muscle function; complete clawing of ring and little fingers; inability to abduct/adduct fingers; complete sensory loss over medial palm, ring and little fingers; hand essentially non-functional for fine tasks.