TOPIC 8A - Costae, sternum, their junctions, mm. respiratorii Flashcards
name the muscles involved in inspiration
m. serratus dorsalis cranialis, scalenus dorsalis and medius, rectus thoracis, levatores costarum, intercostalis externus
origin of m serratus dorsalis cranialis
thoracolumbar fascia, th1-7 SP
insertion of m serratus dorsalis cranialis
prox on ribs 2-10
origin of m scalenus doralis
C4-6 TP
origin of m scalenus medius
C6-7 TP
Insertion of m scalenus dorsalis
2 parts: dorsal part on first 4 ribs
ventral part on first 8 ribs
Insertion of m scalenus medius
cranial border of first rib (aka m scalenus primae costae)
Origin of m rectus thoracis
first rib
insertion of m rectus thoracis
ventral ends of ribs 2-4
origin of Mm levatores costarum
TP of TH 1-12
Insertion of Mm levatores costarum
cranial of ribs near angulus costae
origin &insertion of mm intercostales externus
(fibres run caudoventrally)
caudal border of one rib to cranial border of next
Name the muscles involved in expiration
m retractor costae ultimae, serratus dorsalis caudalis, intercostalis internus, transverse thoracis, subcostalis
origin of m serratus dorsalis caudalis
thoracolumbar fascia
insertion of m serratus dorsalis caudalis
prox on ribs 11-13
origin of m retractor costae ultimae
TP of L1-4
insertion of m retractor costae ultimae
caudally on last rib
origin and insertion of mm intercostalis internus
(fibres run cranioventrally)
cranial border of first rib to caudal border of previous
origin of m transversus thoracis
inner surface of sternum
insertion of m transversus thoracis
costae cartilage 2-8
origin and insertion of m subcostalis
crossing ribs 9-11 medial surface cranioventral direction
how many ribs in eq
18
how many ribs in ru
13
how many in ca
13
which ribs form the costal arch
asternal/spuriae ribs
features of the ribs
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)
which ribs have amphiarthrosis joint in sus
2-5th rib
which ribs have amphiarthrosis joint in Ru
2-10 rib
Tuberosities of the ribs (3)
tuberositas m longissimi
tuberositas m ilocostalis (eq always)
tuberositas m scaleni ventralis (rib 1 except ru)
the two articulations in articulatio costovertebralis
art capitis costae - spheroid joint
art costotransversaria - amphiarthrosis - sliding joint.
art costotransversaria is between
tuberculum costae and TP of thoracic vert
ligaments of the ribs
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)
why are there no hernias in thoracic region
because of lig intercapitis
what kind of art is costochondralis
normally symphysis
amohiarthrosis 2-5 (sus) and 2-10 (Ru)
What kind of art is art sternocostalis
pivot joint
what is the ligament of art sternocostalis
ligg sternocostalis radiata
what kind of art is art sternebralis
synchondrosis sternales - cartilageneous joint
ligaments of art sternebrales
lig sterni (not in ca) membrana sterni
