"origin: medial surface of the ulna, deep and anterior to the extensor carpi ulnaris muscle belly"
"insertion: pisiform bone radial to the flexor carpi ulnaris muscle insertion and/or flexor retinaculum"
"innervation: variable median nerve or ulnar nerve innervation"
Expected headings
"Epidemiology"
"origin: medial surface of the ulna, deep and anterior to the extensor carpi ulnaris muscle belly"