7: Muscles of Hands and Feet Flashcards
(29 cards)
Flexion of wrist, hand, an dfingers
flexor carpi radialis, palmaris longus, flexor carpi ulnaris
flexor carpi radialis OIA
O: medial epicondyle of humerus
I: base of 2nd and 3rd metacarpal bones
A: flexes and abducts hand at wrist
palmaris longus OIA
O: medial epicondyle of humerus
I: flexor retinaculum and palmar aponeurosis
A: flexes wrist weakly
flexor carpi ulnaris OIA
O: medial epicondyle of humerus, olecranon and posterior surface of ulna
I: pisiform and hamate bones, base of 5th metacarpal
A: flexes and adducts hand
extension of the hand
extensor carpi radialis lungus/brevis, extensor digitorum, extensor carpi ulnaris
extensor carpi radialis longus OIA
O: lateral supracondylar ridge of humerus
I: base of 2nd metacarpal bone
A: extends wrist abducts hand
extensor carpi radialis brevis OIA
O: lateral epicondyle of humerus
I: base of 3rd metacarpal bone
A: extends wrist, abducts hand
extensor digitorum OIA
O: lateral epicondyle of humerus
I: distal and middle phalanges of finger 2-5
A: extends wrist, extends 2nd-5th MP joints, PIP joints, and DIP joints
extensor carpi ulnaris OIA
O: lateral epicondyle of humerus, posterior border of ulna
I: base of 5th metacarpal bone
A: extends wrist, adducts hand`
groups of hand muscles
thenar muscles, intermediate muscles, and hypothenar muscles
thenar muscles
flexor pollicis brevis and abductor pollicis brevis
flexor pollicis brevis OIA
O: flexor retinaculum, trapezium
I:proximal phalanx of thumb
A: flexes thumb
abductor pollicis brevis OIA
O: flexor retinaculum, scaphoid, trapezium
I: lateral side of proximal phalanx of thumb
A: abducts thumb
intermediate muscles
adductor pollicis and lumbricales
adductor pollicis OIA
O: (oblique head) capitate, transverse head, bases of 2nd and 3rd metacarpal bones (transverse head) 3rd metacarpal
I: medial side of proximal phalanx of thumb
A: adducts thumb
lumbricales (4) OIA
O: tendons of flexor digitorum profundus
I: dorsal tendons of fingers 2-5
A: flexes 2-5 MP joins and extends 2-5 PIP and DIP joints
hypothenar muscles
abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi
abductor digiti minimi OIA (hand)
O: pisiform and tendon of flexor carpi ulnaris
I: proximal phalanx of digit 5
A: abducts digit 5
flexor digiti minimi brevis OIA
O: hammate bone, flexor retinaculum
I: proximal phalanx of digit 5
A: flexes digit 5
opponens digiti minimi OIA
O: hamate bone, flexor retinaculum
I: 5th metacarpal bone
A: opposition of digit 5
2 nerves that pass through wrist
ulnar nerve and median nerve
forms the carpal tunnel
flexor retinaculum
dorsal muscles of the foot
extensor digitorum brevis
extensor digitorum brevis OIA
O: calcaneus and inferior extensor retinaculum
I: middle phalanges of toes 2-4
A: extends MP and PIP joints of toes 2-4
