Fig. 5
From: Role of dynamic sonography in ulnar nerve entrapment at elbow
Dynamic high-resolution ultrasound was done. a Ulnar nerve (white arrows) is seen within the cubital groove during elbow extension, (*) representing the cubital groove floor. b Dislocated ulnar nerve (white arrows) beyond the medial epicondyle during sequential elbow flexion. Average CSA of the ulnar nerve (UN). ME = medial epicondyle. OLE = olecranon process. c Cross-sectional area of the ulnar nerve (UN) above the elbow (white arrow). d Cross-sectional area of the ulnar nerve (UN) below the elbow (white arrow). FCU = flexor carpi ulnaris muscle