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Hand Muscles
See also: Grips
Thenar Muscles
| Muscle |
Origin |
Insertion |
Nerve |
Action |
Notes |
| abductor pollicis brevis |
scaphoid,
flexor retinaculum |
proximal phalanx of thumb |
median |
abducts thumb |
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| flexor pollicis brevis |
trapezium,
flexor retinaclum |
median |
flexes thumb |
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| opponens pollicics |
trapezium,
flexor retinaculum |
lateral border of metacarpal of thumb |
median |
opposes thumb |
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Hypothenar muscles
| Muscle |
Origin |
Insertion |
Nerve |
Action |
Notes |
| abductor digiti minimi |
pisiform bone |
proximal phalanx of little finger |
ulnar |
abducts little finger |
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| flexor digiti minimi |
hook of hamate,
flexor retinaculum |
ulnar |
flexes little finger |
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| oppones digiti minimi |
hook of hamate,
flexor retinaculum |
medial aspect of metacarpal of little finger |
ulnar |
opposes little finger |
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Others
| Muscle |
Origin |
Insertion |
Nerve |
Action |
Notes |
| lumbricals |
radial side of tendons of flexor digitorum profundus |
extensor expansions |
ulnar
median |
flex metacarpo-phalageal joints,
extend interphalageal joints |
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| palmar interossei |
ulnar side of 1st and 2nd metacarpals,
radial side of 4th and 5th metacarpals |
dorsal extensor expansion |
ulnar |
adduct fingers |
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| dorsal interossei |
metacarpal bones |
dorsal digital expansion,
base of proximal phalanges of digits 2,3 and 4 |
ulnar |
abduct fingers |
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| adductor pollicis |
shaft of middle metacarpal,
bases of 2nd and 3rd metacarpals |
base of proximal phalanx |
ulnar |
adducts thumb |
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