Cubital tunnel syndrome is differentiated from ulnar nerve entrapment at the wrist (in Guyon canal) by the presence of sensory deficits over the ulnar dorsal hand, by the presence of ulnar nerve deficits proximal to the wrist on muscle testing or nerve conduction velocity testing, and by the elicitation of ulnar hand paresthesias by tapping the ulnar nerve in the cubital tunnel at the elbow (positive Tinel sign).