Bones and muscles of the Trunk

Question 1

Which rami wrap around the trunk and innervate intercostal muscles?

Answer 1

ventral

Question 2

what supplies the intercostal muscles?

Answer 2

anterior and posterior intercostal arteries

Question 3

posterior intercostal arteries are branches of?

Answer 3

the aorta

Question 4

anterior intercostal arteries are branches of?

Answer 4

internal thoracic artery

Question 5

which arteries run alongside the sternum

Answer 5

internal thoracic/internal mammary artery

Question 6

what travels between internal and innermost intercostal muscles along the costal groove of an inferior rib?

Answer 6

intercostal neurovascular bundle (includes an intercostal vein, artery and nerve)

Question 7

most active during forceful inspiration and raises the ribs?

Answer 7

External intercostal muscle

Question 8

most active during forceful expiration and lowers the ribs

Answer 8

internal intercostal muscle

Question 9

accessory respiratory muscles; help stabilize thoracic wall during quiet respiration

Answer 9

intercostal muscles

Question 10

which muscle retain, support and compress abdominal contents as well as help move the trunk around all three axes. What are the four muscles?

Answer 10

lateral wall abdominal muscles (external oblique, internal abdominal oblique, transversus abdominis, rectus abdominis)

Question 11

all aponeuroses of the rectus sheath fuse at the?

Answer 11

linea alba

Question 12

above the arcuate line, the aponeuroses of the anterior rectus sheath is formed by?

Answer 12

external oblique and internal oblique

Question 13

above the arcuate line, the aponeuroses of the posterior rectus sheath is formed by?

Answer 13

internal oblique and transversus abdominis

Question 14

Below the level of the arcuate line, what is the composition of the aponeuroses of the anterior rectus sheath?

Answer 14

External oblique
internal oblique
transversus abdominis

Question 15

which rami supply the abdominal wall muscles?

Answer 15

ventral rami

Question 16

abdominal aorta branches into which arteries?

Answer 16

subcostal branches and lumbar arteries

Question 17

once the internal thoracic/ mammary artery crosses the costal margin it becomes what artery?

Answer 17

superior epigastric artery

Question 18

superior epigastric artery anastomoses with these two arteries

Answer 18

lumbar arteries and inferior epigastric

Question 19

branch of the external iliac artery

Answer 19

inferior epigastric

Question 20

what arteries supply the abdominal walls

Answer 20

superior and inferior epigastric arteries

Question 21

how does the inferior epigastric supply the rectus abdominis?

Answer 21

inferior epigastric pierces the transversalis fascia to supply rectus abdominis since the inferior epigastric is not able to pierce the posterior rectus sheath

Question 22

extrinsic back muscles move

Answer 22

the shoulders and arm

Question 23

what are the extrinsic back muscles?

Answer 23

trapezius, latissimus dorsi, rhomboids, serrates posterior

Question 24

what group of muscles maintain an erect posture and move the trunk

Answer 24

intrinsic back muscles

Question 25

What are the three groups of intrinsic back muscles

Answer 25

spinotransverse, erector spinae and transversospinae

Question 26

fibers that travel from spinous process to transverse processs

Answer 26

spinotransverse process

Question 27

vertical fibers (intrinsic back muscle group)

Answer 27

erector spinae

Question 28

fibers that travel from transverse process to spinous process

Answer 28

Transversospinae

Question 29

muscles in the spinotransverse group are?

Answer 29

splenius capitis

splenius cervicis

Question 30

muscles in the erector spinae group are?

Answer 30

ilocostalis (most lateral)
longissimus
spinalis (most medial)

Question 31

this group is found only in the cervical and upper thoracic region

Answer 31

spinotransverse group

Question 32

this group is the main extensors and stabilizers of the thoracic and lumbar vertebral column

Answer 32

erector spinae group

Question 33

muscles of the transversospinae group

Answer 33

semispinalis capitis (largest and crosses 4-6 levels)

Question 34

which rami innervate the intrinsic back muscles

Answer 34

dorsal rami

Question 35

which cutaneous nerves innervate the skin of the back

Answer 35

posterior cutaneous nerves

Question 36

which artery supplies the intrinsic back muscles

Answer 36

posterior intercostal arteries