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thenar muscles

Stack #89873

MuscleOriginInsertionactioninnervation
ABductor pollicis brevis Flexor retinaculum, the scaphoid, &trapezium lateral proximal phalanx of thumb abducts the thumb at CMC joint medial nerve
opponens pollicis (threading a needle) Flexor retinaculum at the trapezium 1st metacarpal- thumb opposition at CMC joint medial nerve
Flexor pollicis brevis , trapizium, capitate, & trapezoid lateral proximal of thumb flexes thumb at CMC & MCP joint medial & ulnar nerve
adductor pollicis OBLIQUE head: capitate, 7 2nd - 3rd metacarpal TRANSVERSE head: 3rd metacarpal medial side of proximal phalanx (sesamoid present) adducts thumb at CMC & MCP joint ulnar nerve
abductor digiti minimi pisiform & tendon of flexor carpi ulnaris proximal phalange of little finger abducts & flexes little finger at MCP joint ulnar nerve
flexor digiti minimi brevis flexor retinaculum & hamate proximal phalnge of little finger flexes little finger at CMC & MCP joint ulnar nerve
opponens digiti minimi flexor retinaculum & hamate medial 5th metacarpal little finger opposition ulnar nerve
Lumbricals tendon of flexor digitorum profundus of each finger tendon of extensor digitorum of proximal phalanges of each finger flexes finger at MCP jt. & extends finger at IP jt. ulnar nerve
palmar interossei sides of metacarpals EXCEPT MIDDLE ONE sides of proximal phalanges of all digits adducts & flex finger at MCP joint ulnar nerve
dorsal interossei adjacent sides of metacarpals proximal phalanx of each finger abduct & flex fingers 2-4 at MCP, extend finger IP joint ulnar nerve
Created by: lea
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