actions

Question 1

psoas major

Answer 1

.flexion at hip
( if thigh is fixed it can also flex the trunk)

Question 2

psoas minor

Answer 2

.weak trunk flexor
(does not cross the hip so it does not have an action at the hip)

Question 3

Quadratus lumborum

Answer 3

.lateral flexion of spine
.extension of spine
.stabilizes 12th rib during inspiration
.depresses 12th rib during forced expiration
.elevates coxal bone

Question 4

iliacus

Answer 4

flexion at Hip

Question 5

glute max

Answer 5

.extends hip against resistance
.assists in external rotation
.helps stabilize the knee

Question 6

glute med

Answer 6

.ABD of hip
anterior fibers do internal rotation
posterior fibers do external rotation

Question 7

glute min

Answer 7

.internal rotation
.assists hip abduction

Question 8

TFL

Answer 8

assists flexion, abduction and medial rotation at hip
assists in stabilizing the knee in extension

Question 9

piriformis

Answer 9

external rotation

Question 10

superior gemellus

Answer 10

external rotation

Question 11

obturator internus

Answer 11

external rotation

Question 12

inferior gemmelus

Answer 12

external rotation

Question 13

Quadratus femoris

Answer 13

external rotation

Question 14

obturator externus

Answer 14

external rotation

Question 15

levator ani

Answer 15

straightens rectum

Question 16

coccygeus

Answer 16

suppors pelvis viscera