Muscle Actions

Question 1

opponens digiti minimi m.

Answer 1

5th digit opposition

Question 2

posterior scalene m.

Answer 2

2nd rib elevation, lateral neck flexion

Question 3

anconeus m.

Answer 3

elbow extension

Question 4

FPL

Answer 4

MCP, IP thumb flexion

Question 5

serratus anterior m.

Answer 5

scapula protraction, superior rotation

Question 6

ECRL

Answer 6

wrist extension, radial deviation

Question 7

ECRB

Answer 7

wrist extension, radial deviation

Question 8

Sternocleidomastoid m.

Answer 8

head rotation to opposite side; neck flexion

Question 9

palmaris brevis m.

Answer 9

draws skin of ulnar side of hand toward center of palm

Question 10

middle scalene m.

Answer 10

1st rib elevation, lateral neck flexion

Question 11

obliquus capitis superior m.

Answer 11

head extension

Question 12

anterior scalene m.

Answer 12

1st rib elevation, lateral neck flexion

Question 13

rectus capitus posterior major m.

Answer 13

head rotation, extension

Question 14

pronator teres m.

Answer 14

pronation

Question 15

supraspinatus m.

Answer 15

initiates arm aBduction

Question 16

FDP

Answer 16

MCP, PIP, DIP flexion

Question 17

FCR

Answer 17

wrist flexion, radial deviation

Question 18

abductor pollicis longus m.

Answer 18

thumb aBduction at carpometacarpal joint

Question 19

extensor pollicis longus m.

Answer 19

thumb extension at IP joint

Question 20

pec major m.

Answer 20

arm flexion, aDduction, medial rotation

Question 21

latissimus dorsi m.

Answer 21

arm extension, medial rotation

Question 22

trapezius m.

Answer 22

scapula elevation, depression, superior rotation, retraction

Question 23

FDS

Answer 23

MCP, PIP flexion

Question 24

opponens pollicis m.

Answer 24

thumb opposition

Question 25

adductor pollicis m.

Answer 25

thumb aDduction

Question 26

subscapularis m.

Answer 26

arm medial rotation, extension

Question 27

deltoid m.

Answer 27

arm aBduction; anterior fibers: arm flexion, medial rotation; posterior fibers: arm extension, lateral rotation

Question 28

EDM

Answer 28

extends: MCP, PIP, DIP joints of 5th digit

Question 29

extensor pollicis brevis m.

Answer 29

thumb extension at MP joint

Question 30

abductor pollicis brevis m.

Answer 30

thumb aBduction

Question 31

biceps brachii m.

Answer 31

arm flexion (long head); elbow flexion, supination

Question 32

infraspinatus m.

Answer 32

arm lateral rotation

Question 33

ECU

Answer 33

wrist extension, ulnar deviation

Question 34

brachioradialis m.

Answer 34

elbow flexion, pronation, supination

Question 35

rectus capitus posterior minor m.

Answer 35

head extension

Question 36

brachialis m.

Answer 36

elbow flexion

Question 37

FCU

Answer 37

wrist flexion, ulnar deviation

Question 38

teres minor m.

Answer 38

arm lateral rotation

Question 39

palmaris longus m.

Answer 39

wrist flexion

Question 40

triceps brachii m.

Answer 40

arm extension, adduction (long head); elbow extension

Question 41

obliquus capitus inferior m.

Answer 41

head rotation, extension

Question 42

ED

Answer 42

extends: MCP, PIP, DIP joints 2-5, wrist

Question 43

EI

Answer 43

extends index finger at MCP, PIP, DIP joints