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Finger & Thumb
Selected Muscles of Finger & Thumb
muscle | description |
---|---|
flexor digitorum profundus | Origin: ulna. Insertion: phalanges (#2-5). Actions: FLEXES wrist, metacarpophalangeal, & interphalangeal joints |
Flexor digitorum superficialis | Origin: humerus, ulna, radius. Insertion: phalanges (# 2-5). Actions: FLEXES wrist, metacarpophalangeal, & interphalangeal joints |
Extensor digitorum | Origin: humerus. Insertion: Phalanges (# 2-5). Actions: EXTENDS wrist, metacarpophalangeal, & interphalangeal joints. |
Extensor indicis | Origin: ulna. Insertion: tendon of extensor digitorum (phalange # 2). Actions: EXTENDS wrist, metacarpophalangeal, & interphalangeal joints. |
Extensor digiti minimi | Origin: humerus. Insertion: tendon of extensor digitorum (phalange # 5). Actions: EXTENDS wrist & metacarpophalangeal joints. |
Abductor pollicis brevis | Origin: carpals (scaphoid & trapezium). Insertion: thumb (proximal phalanx). Actions: ABDUCTS carpometacarpal joint. |
Flexor pollicis brevis | Origin: carpals (trapezium, capitate, & trapezoid). Insertion: thumb (proximal phalanx) . Actions: FLEXES carpometacarpal & metacarpophalangeal joints. |
Adductor pollicis | Origin: carpal (capitate) & metacarpals (# 2 & 3). Insertion: thumb (proximal phalanx). Actions: ADDUCTS carpometacarpal & metacarpophalangeal joints. |
Extensor pollicis longus | Origin: ulna. Insertion: thumb (distal phalanx). Actions: EXTENDS carpometacarpal & interphalangeal joints. ABDUCTS wrist. |
Extensor pollicis brevis | Origin: radius. Insertion: thumb (distal phalanx). Actions: EXTENDS wrist, carpometacarpal, & metacarpophalangeal joints. |
Abductor pollicis longus | Origin: radius, ulna. Insertion: metacarpal (# 1). Actions: ABDUCTS wrist & carpometacarpal joints. EXTENDS carpometacarpal joint. |