EXAM II: Thoracic wall

Question 1

what are the functions of the thoraxc?

Answer 1

protect the vital abdomenal and thoracic organ

resist the - pressure created by the elastic recoil of the lungs

provide attachments for and support the weight of the upper limbs

provide the origin for some upper limb muscles and attachments for muscles of the abdomen, neck, back and respiration.

Question 2

Which ribs are true

Answer 2

1-7

Question 3

which ribs are false

Answer 3

8-10

Question 4

Which ribs are floating

Answer 4

11 and 12

Question 5

What forms the infrasternal angle?

Answer 5

cartilages of 7-10

Question 6

pectus carinatum

Answer 6

abnormal protursion of the sternum.

Question 7

Pectus Excavatum

Answer 7

inward sternum

Question 8

What are some other chest wall deformities?

Answer 8

cleft sternum

poland syndrome (absent pec major)

ectopia cordis (heart outside of the sternum)

Question 9

costotransverse joints:

Answer 9

upper ribs (1-7) rotate

lower ribs 8-10
glide

ribs 11 and 12 do not articulate with this joint

Question 10

T or F do costochondral joints expereince movement.

Answer 10

FALSE

Question 11

What are the three main intercostal muscles??

Answer 11

External intercostal
Internal Intercostal
Innermost intercostal

Question 12

How do the fibers run in the external intercostal muscles?

Answer 12

out and in. Think of hands in pocket.

Question 13

What is the fuction of the external intercostals?

Answer 13

elevate the ribs during forced respiration.

Question 14

how do the internal and inner most intercostal muscles run?

Answer 14

down and back.

Question 15

external intercostal function in respiration:

Answer 15

breathing in: contracting

breathing out relaxing

Question 16

Internal intercostal function in respiration:

Answer 16

breathing in: relax

breahting out: contract.

Question 17

What is the location of the subcostalis and what is its function?

Answer 17

located on the inbetwen part of the back of the ribs and they function the same as the innermost intercostals depress the ribs.

Question 18

What is the function of the transversus thoracis?

Answer 18

depress the ribs located on the sterum and costal cratilage.

Question 19

levator costae

Answer 19

tranvserse process and the rib below elevate the ribs

Question 20

What is the fuction of the serratus posterior superior?

Answer 20

elevate the ribs

Question 21

What is the function of the serratus posterior inferior?

Answer 21

depress the ribs

Question 22

How to the ribs move during inspiration?

Answer 22

they elevate

Question 23

How do ribs move in expiration?

Answer 23

they depress or recoil

Question 24

What is the organization of the vessels in the intercostal space??

Answer 24

V vein
A artery
N nerve