msk 1 actions

Question 1

rectus abdominis

Answer 1

flexion of trunk

Question 2

external oblique

Answer 2

rotation of trunk to same side as contraction

Question 3

what happens if both external obliques contract simultaneously?

Answer 3

flexion of spine

Question 4

internal oblique

Answer 4

rotation of trunk to opposite side of contraction

Question 5

what happens if both internal obliques contract simultaneously?

Answer 5

flexion of spine

Question 6

transverus abdominis

Answer 6

compression of trunk

Question 7

what is the linea alba?

Answer 7

a band of tissue that runs down the middle of the abdominal wall where the transversus abdominis and the obliques meet

Question 8

external intercostal muscles

Answer 8

inhalation

Question 9

do the external intercostal muscle striations run parallel or perpendicular to the striations of the external obliques?

Answer 9

parallel

Question 10

internal intercostal muscles

Answer 10

exhalation

Question 11

do the internal intercostal muscle striations run parallel or perpendicular to the striations of the internal obliques?

Answer 11

parallel

Question 12

innermost intercostal muscles

Answer 12

exhalation

Question 13

what happens to the diaphragm during exhalation?

Answer 13

flattens downward

Question 14

what happens to the diaphragm during inhalation?

Answer 14

bulges upward (making more room for the lungs)

Question 15

erector spinae

Answer 15

rotation to same side as contraction

Question 16

what happens when both erector spinae muscles contract?

Answer 16

extension of spine

Question 17

sternocleidomastoid

Answer 17

rotation of neck to the opposite side of contraction

Question 18

what happens when both sternocleidomastoid muscles contract?

Answer 18

flexion of neck