muscle worksheet: action

Question 1

what is the action of the BRACHIALIS?

Answer 1

flex elbow

Question 2

what is the action of the TRICEPS BRACHII?

Answer 2

all heads: extend elbow

long head: extend & adduct shoulder

Question 3

what is the action of the DELTOID?

Answer 3

abduct the humerus

Question 4

what is the action of the PRONATOR QUADRATUS?

Answer 4

pronate the arm

Question 5

what is the action of the SUPINATOR?

Answer 5

supinate the arm

Question 6

what is the action of the GLUTEUS MAXIMUS?

Answer 6

extends & abducts hip

lower fibers adducts hip

Question 7

what is the action of the GLUTEUS MEDIUS?

Answer 7

extends & abducts hip

Question 8

what is the action of the RECTUS FEMORIS?

Answer 8

flex the hip

Question 9

what is the action of the BICEPS FEMORIS?

Answer 9

flex knee, extend hip

Question 10

what is the action of the TIBIALIS ANTERIOR?

Answer 10

invert foot, dorsiflex ankle

Question 11

what is the action of the GASTROCNEMIUS?

Answer 11

flex knee, plantar flex ankle

Question 12

what is the action of the LEVATOR SCAPULAE?

Answer 12

unilaterally: elevate, downward rotate (the scapula); laterally flex, rotate (the head & neck)

bilaterally: extend head & neck

Question 13

what is the action of the RHOMBOIDEUS MINOR?

Answer 13

adduct, elevate, downwardly rotate the scapula

Question 14

what is the action of the RHOMBOIDEUS MAJOR?

Answer 14

adduct, elevate, downwardly rotate the scapula

Question 15

what is the action of the LATISSIMUS DORSI?

Answer 15

extend, adduct, medially rotate the shoulder

Question 15

what is the action of the GLUTEUS MINIMUS?

Answer 15

abduct, medially rotate, flex the hip

Question 16

what is the action of the ILIOPSOAS?

Answer 16

origin fixed: flex & laterally rotate hip

insertion fixed: flex trunk toward thigh, tilt pelvis anteriorly

unilaterally: laterally flex lumbar spine