TOPIC 8A - Costae, sternum, their junctions, mm. respiratorii

Question 1

name the muscles involved in inspiration

Answer 1

m. serratus dorsalis cranialis, scalenus dorsalis and medius, rectus thoracis, levatores costarum, intercostalis externus

Question 2

origin of m serratus dorsalis cranialis

Answer 2

thoracolumbar fascia, th1-7 SP

Question 3

insertion of m serratus dorsalis cranialis

Answer 3

prox on ribs 2-10

Question 4

origin of m scalenus doralis

Answer 4

C4-6 TP

Question 5

origin of m scalenus medius

Answer 5

C6-7 TP

Question 6

Insertion of m scalenus dorsalis

Answer 6

2 parts: dorsal part on first 4 ribs

ventral part on first 8 ribs

Question 7

Insertion of m scalenus medius

Answer 7

cranial border of first rib (aka m scalenus primae costae)

Question 8

Origin of m rectus thoracis

Answer 8

first rib

Question 9

insertion of m rectus thoracis

Answer 9

ventral ends of ribs 2-4

Question 10

origin of Mm levatores costarum

Answer 10

TP of TH 1-12

Question 11

Insertion of Mm levatores costarum

Answer 11

cranial of ribs near angulus costae

Question 12

origin &insertion of mm intercostales externus

Answer 12

(fibres run caudoventrally)

caudal border of one rib to cranial border of next

Question 13

Name the muscles involved in expiration

Answer 13

m retractor costae ultimae, serratus dorsalis caudalis, intercostalis internus, transverse thoracis, subcostalis

Question 14

origin of m serratus dorsalis caudalis

Answer 14

thoracolumbar fascia

Question 15

insertion of m serratus dorsalis caudalis

Answer 15

prox on ribs 11-13

Question 16

origin of m retractor costae ultimae

Answer 16

TP of L1-4

Question 17

insertion of m retractor costae ultimae

Answer 17

caudally on last rib

Question 18

origin and insertion of mm intercostalis internus

Answer 18

(fibres run cranioventrally)

cranial border of first rib to caudal border of previous

Question 19

origin of m transversus thoracis

Answer 19

inner surface of sternum

Question 20

insertion of m transversus thoracis

Answer 20

costae cartilage 2-8

Question 21

origin and insertion of m subcostalis

Answer 21

crossing ribs 9-11 medial surface cranioventral direction

Question 22

how many ribs in eq

Answer 22

18

Question 23

how many ribs in ru

Answer 23

13

Question 24

how many in ca

Answer 24

13

Question 25

which ribs form the costal arch

Answer 25

asternal/spuriae ribs

Question 26

features of the ribs

Answer 26

``` facies articularis capitis costae cran and caud genu costae sulcus costae caput costa tuberculum costae collum costae spatium intercostales tuberositas m longissimi tuberositas m ilocostalis (eq always) tuberositas m scaleni ventralis (rib 1 except ru) ```

Question 27

which ribs have amphiarthrosis joint in sus

Answer 27

2-5th rib

Question 28

which ribs have amphiarthrosis joint in Ru

Answer 28

2-10 rib

Question 29

Tuberosities of the ribs (3)

Answer 29

tuberositas m longissimi tuberositas m ilocostalis (eq always) tuberositas m scaleni ventralis (rib 1 except ru)

Question 30

the two articulations in articulatio costovertebralis

Answer 30

art capitis costae - spheroid joint | art costotransversaria - amphiarthrosis - sliding joint.

Question 31

art costotransversaria is between

Answer 31

tuberculum costae and TP of thoracic vert

Question 32

ligaments of the ribs

Answer 32

lig capitis costae radiatum (cran - bosy pf previous vert, caud body of same vert) lig capitis costae intraarticulare (sulcus capitis costae to vert column via 1. lig intercapitale, 2, short cran limb and 3. short caudal limb) lig costotransversarium (TP to doral surface collum costae) lig tuberculi costae (TP Th to tuberculum costae)

Question 33

why are there no hernias in thoracic region

Answer 33

because of lig intercapitis

Question 34

what kind of art is costochondralis

Answer 34

normally symphysis | amohiarthrosis 2-5 (sus) and 2-10 (Ru)

Question 35

What kind of art is art sternocostalis

Answer 35

pivot joint

Question 36

what is the ligament of art sternocostalis

Answer 36

ligg sternocostalis radiata

Question 37

what kind of art is art sternebralis

Answer 37

synchondrosis sternales - cartilageneous joint

Question 38

ligaments of art sternebrales

Answer 38

``` lig sterni (not in ca) membrana sterni ```