intercostal muscles

Question 1

intercostal muscles

Answer 1

• external intercostal muscle
• internal intercostal muscle
• innermost intercostal muscle
• subcostalis muscle
• sternocostalis muscle

Question 2

ext. muscle origin

Answer 2

outer border of costal groove on lower border of the rib

Question 3

ext. muscle insertion

Answer 3

upper border of the rib below

Question 4

ext. muscle extension

Answer 4

tubercle of the rib> costochondral junction

Question 5

ext. intercostal muscle continues ant. as

Answer 5

external intercostal membrane

Question 6

ext. intercostal muscle’s direction

Answer 6

downward & forward

Question 7

int. intercostal muscle origin

Answer 7

floor of costal groove on the lower border of the rib

Question 8

int. intercostal muscle insertion

Answer 8

upper border of the rib below

Question 9

int. intercostal muscle extension

Answer 9

sternum > angle of the rib

Question 10

int. intercostal muscle continues post. as

Answer 10

posterior (internal) intercostal membrane

Question 11

int. intercostal muscle’s direction

Answer 11

downward & backward

Question 12

innermost intercostal origin

Answer 12

inner border of costal groove on lower border of the rib

Question 13

innermost intercostal insertion

Answer 13

upper border of the rib below

Question 14

innermost intercostal extension

Answer 14

middle 2/4 of intercostal space

Question 15

innermost intercostal’s direction

Answer 15

downward & backward

Question 16

subcostalis muscle function

Answer 16

connects inner surfaces of the ribs

Question 17

sternocostalis muscle function

Answer 17

connects ribs to sternum

Question 18

intercostal muscles function

Answer 18

deep forced respiratory functions

Question 19

main muscle of respiration

Answer 19

diaphragm

Question 20

neurovascular plane of thorax

Answer 20

*lies between internal intercostal and innermost intercostal muscle
* contents: post. intercostal vein
post. intercostal artery
intercostal nerve