muscular system week 1 (muscles that move the hand)

Question 1

flexor carpi radialis

Answer 1

location: muscle of the superficial anterior forearm. originates on the medial epicondyle of humerus. inserts of the second and third metacarpals
action: flexes and abducts hand

Question 2

flexor carpi ulnaris

Answer 2

location: muscle of the superficial anterior forearm. originates on the medical epicondyle of humerus and superior posterior border of ulna. inserts on the pisiform, hamate, and base of fifth metacarpal
action: flexes and adducts the hand

Question 3

palmaris longus

Answer 3

location: muscle of the superficial anterior forearm. originates on the medial epicondyle of humerus. inserts on the flexor retinaculum and palmar aponeurosis
action: flexes the hand

Question 4

flexor digitorum superficialis

Answer 4

location: muscle of the superficial anterior forearm. originates on the medial epicondyle of humerus, coronoid process of ulna, and ridge along lateral margin of anterior surface of radius. inserts on the middle phalanx of each finger
action: flexes the digits and hand

Question 5

flexor digitorum profundus

Answer 5

location: muscle of the deep anterior forearm. originates on the anterior medial surface of the body of ulna. inserts on the base of distal phalanx of each finger
action: flexes the digits and hand

Question 6

extensor digitorum

Answer 6

location: muscle of the superficial posterior forearm. originates on the lateral epicondyle of humerus. inserts on the distal and middle phalanges of each finger
action: extends the digits and hand

Question 7

extensor carpi ulnaris

Answer 7

location: muscle of the superficial posterior forearm. originates on the lateral epicondyle of humerus and posterior border of ulna. inserts on the fifth metacarpal
action: extends the digits and adducts the hand

Question 8

extensor carpi radialis longus

Answer 8

location: muscle of the superficial posterior forearm. originates on the lateral supracondylar ridge of humerus. inserts on the second metacarpal
action: extends and abducts hand

Question 9

extensor carpi radialis brevis

Answer 9

location: muscle of the superficial posterior forearm. originates n the lateral epicondyle of the humerus and inserts on the third metacarpal
action: extends and abducts hand

Question 10

extensor digiti minimi

Answer 10

location: muscle of the superficial posterior forearm. originates on the lateral epicondyle of humerus.. inserts on the tendon of extensor digitorum on the fifth phalanx
action: extends the digits and hand

Question 11

abductor pollicis longus

Answer 11

location: muscle of the deep posterior forearm. originates on the posterior surface of middle of radius and ulna and interosseous membrane. inserts on first metacarpal
action: abducts and extends thumb/pollicis and abducts hand

Question 12

extensor pollicis brevis

Answer 12

location: muscle of the deep posterior forearm. originates on the posterior surface of middle of the ulna and inserts on the distal phalanx of pollicis
action: extends thumb/pollicis and abducts the hand