muscles of the forearm

Question 1

anything on the anterior are ____, anything on the posterior are ______

Answer 1

flexors, extensors

Question 2

what is this muscle? Origin? Insertion? Action? Layer?

Answer 2

pronator teres

origin: coronoid process of ulna + medial epicondyle of humerus
insertion: radius
origin: pronate forearm
layer: superficial - connects to palm

Question 3

what is this muscle? Origin? Insertion? Action? Layer?

Answer 3

Flexor carpi radialis

origin: humerus
insertion: metacarpals 2 and 3
action: flex wrist + abduct hand
layer: superficial - connects to thumb

Question 4

what is this muscle? Origin? Insertion? Action? Layer?

Answer 4

palmaris longus

origin: humerus
insertion: palmar aponeurosis
action: flex wrist
layer: superficial - connects to pinky

Question 5

what is this muscle? Origin? Insertion? Action?

Answer 5

Brachioradialis

origin: distal humerus
insertion: radius
action: flex forearm

Question 6

what is this muscle?

Answer 6

brachioradialis

Question 7

what is this muscle? Origin? Insertion? Action? Layer?

Answer 7

extensor carpi radialis longus

origin: humerus
insertion: metacarpal 2
action: extend wrist + abduction wrist

Question 8

what is this muscle? Origin? Insertion? Action? Layer?

Answer 8

extensor carpi radialis brevis

origin: humerus
insertion: metacarpal 3
action: extend wrist + abduct wrist

Question 9

what is this muscle? Origin? Insertion? Action?

Answer 9

extensor digitorum

origin: humerus
insertion: phalanges 2-5
action: extend fingers

Question 10

what is this muscle? Origin? Insertion? Action?

Answer 10

Extensor carpi ulnaris

origin: humerus
insertion: metacarpal 5
action: extend + abduct wrist

Question 11

what is this muscle? Origin? Insertion? Action?

Answer 11

flexor digitorum superficialis

origin: humerus + ulna
insertion: middle phalanges 2-5
action: flex hand + flex phalanges

Question 12

what is this muscle? Origin? Insertion? Action?

Answer 12

flexor carpi ulnaris

origin: humerus and ulna
insertion: pisiform, hamate, and metacarpal 5
action: flex wrist + adduct hand

Question 13

what is this muscle? Origin? Insertion? Action?

Answer 13

flexor pollicis longus

origin: radius
insertion: distal phalanx 1
action: flex thumb

Question 14

what is this muscle? Origin? Insertion? Action?

Answer 14

supinator
(under the brachioradialis muscle)

origin: humerus and ulna
insertion: radius
action: supinate forearm