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MOINA of wrist &hand

Origin, Insertion, Nerve supply, Action of muscles of the wrist and hand

MUSCLEORIGININSERTIONNERVEACTION
Abductor pollicis brevis Scaphoid ,trapezium, flexor retinaculum Base of proximal phalanx of thumb Median nerve (C8; T1) Abduction of thumb
Flexor pollicis brevis Flexor retinaculum Base of proximal phalanx of thumb Median nerve (C8;T1) Flexes metacarpophalangeal joint of thumb
Opponens pollicis Flexor retinaculum Shaft of metacarpal bone of thumb Median nerve (C8; T1) Pulls thumb medially and forward across palm
Adductor pollicis Oblique head; 2nd,3rd metacarpal bones Transverse head; 3rd metacarpal bone Base of proximal phalanx of thumb Deep branch of ulnar nerve (C8; T1) Adduction of thumb
Abductor digiti minimi Pisiform bone Base of proximal phalanx of little finger Deep branch of ulnar nerve (C8; T1) Abducts little finger
Flexor digiti minimi Flexor retinaculum Base of proximal phalanx of little finger Deep branch of ulnar nerve (C8; T1) Flexes little finger
Opponens digiti minimi Flexor retinaculum Medial border 5th metacarpal bone Deep branch of ulnar nerve (C8; T1) Pulls 5th metacarpal forward as in cupping the palm
Palmaris brevis Flexor retinaculum, palmar aponeurosis Skin of palm Superficial branch of ulnar nerve (C8; T1) Corrugates skin to improve grip of palm
Palmar interossei (4) Base of 1st metacarpal bone, remaining 3 from anterior shaft of 2nd, 4th, and 5th metacarpals Proximal phalanges of thumb, index, ring finger; Dorsal extensor expansion of each finger Deep branch of ulnar nerve (C8; T1) Adducts dingers toward center of 3rd finger, flexes MCP joints and extends IP joints
Dorsal interossei (4) Contiguous sides of shafts of metacarpal bones Proximal phalanges of index, middle, ring finger; dorsal extensor expansion Deep branch of ulnar nerve (C8; T1) Abducts fingers from center of 3rd finger, Flexes MCP joints and extends IP joints
Lumbricals (4) Tendons of flexor digitorum profundus Extensor expansion of medial 4 fingers 1st, 2nd, median nerve; 3rd, 4th , deep branch of ulnar nerve (C8; T1) Flexes MCP joints, extends IP joints of fingers except thumb
Created by: alssndr
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