TOPIC 9A MM CINGULORUM MEMBRI THORACICI & PELVINI

Question 1

superficial thoracic muscles

Answer 1

m lat dors, trapezius, pectoralis superficialis, sternocleidomastoideus and m omotransversarius

Question 2

m lat dors (O, I, F, Innerv)

Answer 2

O: thoracolumbar fascia
I: m teres major
F: draws limb caudally
Innerv: N thoracodorsalis

Question 3

m trapezius (O, I, F, Innerv)

Answer 3

O: pars cervicis - raphe of neck, pars thoracis - supraspinous ligament
I: pars cervicis - prox 3/4 spina scap, pars thoracis - prox 1/3 spina scap
F: support trunk, lift leg cran
Innerv: N accessorius

Question 4

M omotransversarius (O, I, F, Innerv)

Answer 4

O: distally on spina scap
I: ala atlantis caudal border
F: free limb - moves cranially. fixed limb - moves neck laterally
Innerv: N accessorius

Question 5

M sternocleidomastoideus

Answer 5

sternocephalicus: manubrium sterni to mastoid process of temporal bone (sternomastoideus) or nuchal crest of occipital bone (sternooccipitalis)
action: unilat - head laterally. bilat - head down

Brachiocephalicus: from crista humeris and distal cranial surface of humerus to intersectio clavicularis (cleidobrachialis). from intersectio to mastoid process (cleidomastoideus) or to raphe cervicis (cleidocervicalis)

action: head laterally or down if limb fixed. limb free moves it cranially

Question 6

M pectoralis superficialis (O, I, F, Innerv)

Answer 6

O: pars descendens - manubrium sterni
pars transversus - sternebrae 1-3

I: crista tuberc major and crista humeri

F: ventral connection to trunk, adduction of FL

Innerv: N pectoralis cranialis

Question 7

Name deep muscles of thoracic cavity

Answer 7

m pectoralis profundus, serratus ventralis, rhomboideus and subclavius (not in ca)

Question 8

m pectoralis profundus (O, I, F, Innerv)

Answer 8

O: all costal certilage of true ribs and sternebrae
I: ca, su: tuberculi major. eq: tuberculi major and minor
F: supports trunk and is a strong retractor and adductor
Innerv: N pectoralis caudalis

Question 9

M serratus ventralis (O, I, F, Innerv)

Answer 9

O: pars cervicis: TP C2-7. pars thoracis: middle of ribs 1-8.

I: facies serrata medially on scapula

F: supports trunk, carries limb cran or caud.

Innerv: N thoracis longus

Question 10

M rhomboideus (O, I, F, Innerv)

Answer 10

O: pars capitis: nuchal crest (only in ca and su)
pars cervicis: raphe cervicis and SP TH 1-3
pars thoracis: SP TH4-7

I: dorsomedial border of scapula

F: free limb: base of scapula pulled towards trunk
fixed limb: raises neck
supports trunk

Question 11

M subclavius (O, I, F, Innerv)

Answer 11

not in canine
O: manubrium sterni
I: cranial border of scapula and intersectio clavicularis

Question 12

Name the muscles of the pelvic girdle

Answer 12

M iliopsoas (M iliacus & m psoas major), M psoas minor and M quadratus lumborum

Question 13

M Iliacus (O, I, F)

Answer 13

O. between linea arcuata and lateral border of iliac bone
I: trochanter minor of femur (medially)
F: flexes hip - draws limb forward. or if femus fixed; flexion and fixation of vertebral column.

Question 14

M psoas major (O, I, F)

Answer 14

O. ventral from bodies and TP of Lumbar Vert
I. Trochanter minor of femus (medially)
F. draws limb forward by flexing hip. if femur fixed then flexes and fixation of vert column.

Question 15

M quadratus lumborum (O, I, F)

Answer 15

O. ventrally on 11-13th thoracic vert, last 2 ribs and Lumbar vert TP

I. medial surface of iliac wing

F. fix and flex vertebral column

Question 16

Name the supf muscles of the thoracic girdle

Answer 16

5:
lat dorsi
trapezius
omotransversarius
pectoralis supf (descendens and transversus)
sternocleidomastoideus

Question 17

name the deep muscles of the thoracic girdle

Answer 17

rhomboideus
pectoralis profundus
subclavius (eq)
serratus ventralis