Palmaris brevis | Palmar aponeurosis and flexor retinaculum | Dermis on the ulnar side of hand | Tenses the skin over the hypothenar muscles | Ulnar n., superficial branch (C8–T1) |
Thenar muscles |
Abductor pollicis brevis | Flexor retinaculum, scaphoid, and trapezium | Proximal phalanx of digit 1 | Abduction of thumb | Median n., recurrent branch (C8–T1) |
Flexor pollicis brevis | Deep head: trapezium and flexor retinaculum Superficial head: trapezoid and capitate | | Flexion of digit 1 (metacarpophalangeal joint) | |
Opponens pollicis | Trapezium and flexor retinaculum | Metacarpal 1 | Medial rotation of thumb and flexion of metacarpal of digit 1 | |
Adductor compartment |
Adductor pollicis | Oblique head: metacarpals 2 and 3 and capitate Transverse head: metacarpal 3 | Proximal phalanx of digit 1 | Adduction of thumb | Ulnar n., deep branch (C8–T1) |
Hypothenar muscles |
Abductor digit minimi | Pisiform bone, pisohamate ligament, and tendon of flexor carpi ulnaris | Proximal phalanx of digit 5 | Abduction of digit 5 | Ulnar n., deep branch (C8–T1) |
Flexor digiti minimi brevis | Hook of hamate and flexor retinaculum | | Flexion of metacarpophalangeal joint of digit 5 | |
Opponens digiti minimi | | Metacarpal 5 | Lateral rotation of metacarpal 5 | |
Central compartment |
Lumbricals 1 and 2 | Lateral two tendons of flexor digitorum profundus | Lateral sides of dorsal digital expansions for digits 2–5 | Flexes metacarpophalangeal joints and extends interphalangeal joints | Median n. (C8–T1) |
Lumbricals 3 and 4 | Medial two tendons of flexor digitorum profundus | | | Ulnar n., deep branch (C8–T1) |
Dorsal interossei 1–4 | Adjacent sides of metacarpals | Dorsal digital expansions and base of proximal phalanges of digits 2–4 | Abducts digits (DAB) and flexes metacarpophalangeal joints and extends interphalangeal joints | Ulnar n., deep branch (C8–T1) |
Palmar interossei 1–3 | Metacarpals 2, 4, and 5 | Dorsal digital expansions and base of proximal phalanges of digits 2, 4, and 5 | Adducts digits (PAD) and flexes metacarpophalangeal joints and extends interphalangeal joints | |