A&P Lab: MUSCLES- Hand & Finger Muscles (pictures)

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Extensor pollicis brevis (extrinsic)

Extension at joints of thumb; abduction at wrist

Extensor pollicis longus (extrinsic)

Extension at joints of thumb; abduction at wrist

Flexor carpi ulnaris

Flexes and adducts hand (ulnar deviation) at wrist joint

Flexor digitorum profundus

Flexes distal and middle phalanges of each finger at interphalangeal joints, proximal phalanx of each finger at metacarpophalangeal joint, and hand at wrist joint

Flexor digiti minimi

Flexes pinky finger

Abductor pollicis brevis (intrinsic)

Abduction at joints of thumb and wrist

Abductor pollicis longus (extrinsic)

Abducts and extends thumb at carpometacarpal joint and abducts hand at wrist joint

Abductor digiti minimi

Abducts pinky finger

Adductor pollicis (intrinsic)

Adducts thumb

Extensor carpi radialis brevis

Extends and abducts hand at wrist joint

Extensor carpi radialis longus

Extends and abducts hand at wrist joint

Extensor carpi ulnaris

Extends and adducts hand at wrist joint

Extensor digiti minimi

Extension a at joints of little finger

Extensor indicis

Extension and adduction at joints of index finger

Extensor digitorum

Extension at finger joints and wrist

Flexor carpi radialis

Flexes and abducts hand (radial deviation) at wrist joint

Flexor digitorum superficialis

Flexes middle phalanx of each finger at proximal interphalangeal joint, proximal phalanx of each finger at metacarpophalangeal joint, and hand at wrist joint

Flexor pollicis brevis (intrinsic)

Flexes thumb at carpometacarpal and metacarpophalangeal joints

Flexor pollicis longus (extrinsic)

Flexion at joints of thumb

Opponens digiti minimi

Opposition of pinky finger

Opponens pollicis

Opposition of thumb

Palmaris longus

Weakly flexes hand at wrist joint


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