Thorax

Question 1

true ribs (vertebrosternal)

Answer 1

ribs 1-7;

attach directly to sternum through own costal cartilages

Question 2

false ribs (vertebrochondral)

Answer 2

ribs 8,9, usually 10

cartilages are connected to cartilage of rib above them; indirect connection to sternum

Question 3

floating ribs (vertebral, free)

Answer 3

ribs 11 and 12, sometimes 10

do not connect at all to sternum

Question 4

typical rib components

Answer 4

ribs 3-9; head, neck, tubercle, body

Question 5

atypical rib number

Answer 5

1,2 and 10-12

Question 6

1st rib components

Answer 6

broadest rib, only articulates with T1. scalene tubercle

Question 7

2nd rib components

Answer 7

two facets for articulation with T1 and T2, serratus anterior tuberosity

Question 8

ribs 10-12

Answer 8

only one facet like 1st rib; only articulate with a single vertebrae

Question 9

ribs 11 and 12

Answer 9

short; no neck or tubercle

Question 10

sternum vertebrae locations

Answer 10

manubrium-T3
body of sternum-T5-T9
xiphoid process-T10

Question 11

head of the rib articulates with:

Answer 11

superior costal facet of corresponding vertebrae
inferior costal facet of vertebrae superior to it

ex: head of 8th rib articulates with superior costal facet of T8 and inferior costal facet of T7

Question 12

serratus posterior superior

superior attachment

Answer 12

nuchal ligament, spinous processes of C7-T3 vertebrae

Question 13

serratus posterior superior

inferior attachment

Answer 13

superior borders of 2nd-4th ribs

Question 14

serratus posterior superior innervation

Answer 14

2nd-5th intercostal nerves

Question 15

serratus posterior superior main action

Answer 15

proprioception (elevates ribs)

Question 16

serratus posterior inferior

superior attachment

Answer 16

spinous processes of T11-L2 vertebrae

Question 17

serratus posterior inferior

inferior attachment

Answer 17

inferior borders of 8th-12th ribs near their angles

Question 18

serratus posterior inferior innervation

Answer 18

anterior rami to T9-T12 thoracic spinal nerves

Question 19

serratus posterior inferior main action

Answer 19

proprioception (depress ribs)

Question 20

levator costarum superior attachment

Answer 20

transverse processes of C7-T11

Question 21

levator costarum inferior attachment

Answer 21

subjacent ribs between tubercle and angle

Question 22

levator costarum innervation

Answer 22

posterior primary rami of C8-T11 nerves

Question 23

levator costarum main action

Answer 23

elevates ribs

Question 24

external, internal and innermost intercostals superior attachment

Answer 24

inferior border of ribs

Question 25

external, internal and innermost intercostals inferior attachment

Answer 25

superior border of ribs below

Question 26

external, internal, innermost intercostals innervation

Answer 26

intercostal nerve

Question 27

external intercostals main action

Answer 27

elevate ribs during forced inspiration

Question 28

internal and innermost intercostals main action

Answer 28

interosseous part: depresses ribs
interchondral part: elevates ribs

during active (forced) respiration

Question 29

subcostal muscles superior attachment

Answer 29

internal surface of lower ribs near their angles

Question 30

subcostal muscles inferior attachment

Answer 30

superior borders of 2nd or 3rd ribs below

Question 31

subcostal muscles innervation

Answer 31

intercostal nerve

Question 32

subcostal muscles main action

Answer 32

probably act in same manner as internal intercostal muscles

Question 33

transversus thoracis superior attachment

Answer 33

posterior surface of lower sternum

Question 34

transversus thoracis inferior attachment

Answer 34

internal surfaces of costal cartilages 2-6

Question 35

transversus thoracis innervation

Answer 35

intercostal nerve

Question 36

transversus thoracis main action

Answer 36

proprioception, weakly depresses ribs