Chapter 10: Trunk Muscles

Question 1

erector spinae

Question 2

iliocostalis

Question 3

longissimus

Question 4

spinalis

Question 5

scalene

Answer 5

elevate the first two ribs for more forceful inspiration

Question 6

external intercostals

Answer 6

elevate the ribs during quiet, resting inspiration

Question 7

transversus thoracis

Answer 7

muscles depress the ribs during forced expiration

Question 8

internal intercostals

Answer 8

muscles that depress the ribs during forced expiration

Question 9

diaphragm

Question 10

rectus abdominus

Question 11

linea alba

Answer 11

the band of tough connective tissue that runs the midline of the abdomen.

Question 12

tendinous intersections

Question 13

linea semilunaris

Question 14

external abdominal oblique

Question 15

internal abdominal obliique

Question 16

transversus abdominus

Question 17

pelvic diaphragm

Question 18

what is the name of the superficial subgroup of back muscles?

Question 19

list the muscles of the anterior abdominal wall

Question 20

what are the functions of the abdominal muscles?

Answer 20

1. flex and rotate the vertebral column
2. decrease the volume of the abdominal and thoracic cavities
3. can aid in functions such as vomiting, defecation, child birth, and coughing
4. protecting the abdominal viscera

Question 21

what is the anatomical basis for the segments seen on a well-muscled individual’s abdomen?

Question 22

what openings penetrate the pelvic diaphragm muscles?

Question 23

name the area inferior to the pelvic diaphragm

Question 24

True or False: Muscles of the vertebral column participate in flexion, extension, and rotation?

Answer 24

True