A superficial stratum (3) of the abductor pollicis brevis has been detached from its origin and reflected distally. The deeper part of this muscle (8), which is partially fused with the opponens pollicis (10), remains in place.
Proper palmar digital nerves of median nerve
Dorsal digital nerve of radial nerve
Abductor pollicis brevis muscle (superficial part, reflected from origin)
Position of first metacarpophalangeal joint
Muscular branch of median nerve (to abductor pollicis brevis muscle)
Lumbrical muscle
Anterior common digital artery (to thumb and index finger)
Abductor pollicis brevis muscle (deeper part)
Flexor pollicis brevis muscle (superficial head)
Opponens pollicis muscle
Muscular branch of median nerve (recurrent branch source of nerve labeled at 5)
Remnant of palmar aponeurosis
Abductor pollicis longus muscle
Transverse carpal ligament
Superficial anterior branch radial artery
Flexor carpi radialis muscle (tendon of insertion)
Anterior carpal ligament
Ulnar artery
Ulnar nerve
Opponens digiti minimi muscle
Left pointer: Sheath of common tendon of flexor muscles (inflated with air) Right pointer: Lobule of fat
Left pointer: Median artery Right pointers: Branches of median nerve
Anastomotic branch of median nerve with ulnar nerve