muscles of trunk and neck

Question 1

• flex head
• lat flex
• rotation opp side

Answer 1

action of scalenes and sternocleidomastoid

Question 2

action of external oblique

Answer 2

flexion lat flexion to same side rotation to opposite side

Question 2

• extension/hyperextension
• lat flex same side
• rotation same side

Answer 2

actions of erector spinae and spelnius

Question 3

origin and insertion of internal oblique

Answer 3

O: -lat upper half of inguinal ligament -anterior half of illiac crest -lumbar fascia

I: -costal cartilage of ribs 7-10 -linea alba

Question 4

action of rectus abdominis

Answer 4

flexion and lateral flexion of the trunk decrease curvature of lumbar region

Question 5

flexion

lat flex to same side

rotation to same side

Answer 5

actions of internal oblique

Question 6

actions of erector spinae

Answer 6

-extension/hyperextension -lat flex same side -rotation same side

Question 7

actions of internal oblique

Answer 7

flexion lat flex to same side rotation to same side

Question 7

action of spelnius

Answer 7

-extension/hyperextension -lat flex -rotation same side

Question 9

origin and insertion of external oblique

Answer 9

O: inferior border of lower 8 ribs

I: -anterior half of illiac crest -linea alba

Question 10

flexion

lat flexion to same side

rotation to opposite side

Answer 10

action of external oblique

Question 11

origin and insertion of quadratus lumborum

Answer 11

O: -posterior iliac crest -iliolumbar ligament

I: -lower border of 12th rib -transverse process of first 4 lumbar vert

Question 12

• compression of abdomen
• stabilize trunk
• strong muscle of exhalation

Answer 12

action of transversus abdominus

Question 13

action of transversus abdominus

Answer 13

-compression of abdomen -stabilize trunk -strong muscle of exhalation

Question 13

action of quadratus lumborum

Answer 13

-lat flex -stabilize pelvis and lumbar spine -extension

Question 14

• extenstion/ hyper extension
• lat flexion same side
• rotation opp side

Answer 14

actions of deep posterior spinal muscles

Question 15

actions of deep posterior spinal muscles

Answer 15

-extenstion/ hyper extension -lat flexion same side -rotation opp side

Question 17

action of scalenes

Answer 17

-flex head -lat flex -rotation opp side

Question 18

origin and insertion of rectus abdominis

Answer 18

O: anterior surface of pubic crest

I: -xiphoid process -anterior cartilage of 5th-7th ribs

Question 20

flexion and lateral flexion of the trunk decrease curvature of lumbar region

Answer 20

action of rectus abdominis

Question 21

• lat flex
• stabilize pelvis and lumbar spine
• extension

Answer 21

action of quadratus lumborum

Question 22

origin and insertion of sternocleidomastoid

Answer 22

O: -sup border of manubrium -medial third of clavicle

I: mastoid process

Question 23

actions of sternocleidomastoid

Answer 23

-flex head -lat flex same side -rotation opp side