THRA.8 Flashcards
Give the muscle groups of the topic: ‘Muscles of the thoracic and pelvic girdle’
- Superficial thoracic girdle musculature
- Deep thoracic girdle musculature
- Pelvic girdle musculature
List the superficial thoracic girdle musculature
- M. trapezius
- M. sternocleidomastoideus
- M. omotransversarius
- M. latissimus dorsi
- M. pectoralis superficialis
M. trapezius
- Pars cervicalis
- Pars thoracica
Action: Supports trunk, lifts forelimb, moves forelimb caudally
Innervation: Nervi accessorius (CN-XI)
Blood flow: Ramus prescapularis
M. trapezius pars cervicalis
Origin: Raph of the neck between C3 & Th2
Insertion: Proximal spina scapulae
M. trapezius pars thoracica
Origin: Supraspinsous ligament Th3 - Th9
Insertion: Proximal spina scapulae
Give the components of m. brachiocephalicus
- M. cleidobrachialis
- M. cleidocephalicus
- M. cleidooccipitalis (Ru/Su)
- M. clediomastoideus
- M. cleidocervicalis (Ca only)
Give the components of m. sternocephalicus
- M. sternomandibularis (Eq/Ru)
- M. sternomastoideus (Ø Eq)
- M. sternooccipitalis (Ca)
M. sternocleidomastoideus can be divided into…
- M. brachiocephalicus
- M. sternocephalicus
Action of the m. brachiocephalicus
- Extend shoulder joint
- Moves head laterally and downwards
- Move forelimb cranially
m. cleidobrachialis
Origin: Distal, cranial surface of humerus, crista humeri
Insertion: Clavicular intersection
Innervation: Nervi axillaris
Bloodflow: Ramus deltoideus
M. cleidocervicalis
Ca only
Origin: Clavicular intersection
Insertion: Dorsal midline (raphe cervicis) on cranial half of neck
Innervation: Nervi accessorius (CN-XI) ramus dorsalis
Bloodflow: A**rteria auricularis caudalis & arteria cervicalis superficialis
M. cleidomastoideus
Origin: Clavicular intersection
Insertion: Os temporale pars petrosa pars mastoidea
Innervation: Nervi accessorious (CN-XI) ramus dorsalis
Bloodflow: Arteria auricularis caudalis, arteria cervicalis superficialis and arteria thyroidea cranialis
M. cleidooccipitalis
Ru/Su
Origin: Clavicular intersection
Insertion: Crista nuchae, linea nuchae, ligamentum nuchae
Innervation: Nervi accessorius (CN-XI) ramus dorsalis
Bloodflow: Arteria auricularis caudalis and arteria cervicalis superficialis
Action of the m. sternocephalicus
Draws head ventrolaterally
M. sternomandibularis
Eq/Ru
Origin: Manubrium sterni
Insertion: Fascia masseterica of ramus mandibulae (Ru)
Tuberositas musculi sternomandibularis (Eq)
Innervation: Nervi accessorious (CN-XI) ramus ventralis
Bloodflow: Arteria cervicalis superficialis and arteria thyreoidea cranialis
M. sternomastoideus
Ø Eq
Origin: manubrium sterni
Insertion: Os temporale pars petrosa pars mastoidea
Innervation: N**ervi accessorious (CN-XI) ramus ventralis
Bloodflow: Arteria cervicalis superficialis, arteria thyroidea cranialis and arteria laryngea cranialis
M. sternooccipitalis
Ca only
Origin: manubrium sterni
Insertion: Crista nuchae os occipitale
Innervation: N**ervi accessorious (CN-XI) ramus ventralis
Bloodflow: Arteria cervicalis superficialis and arteria thyroidea cranialis
M. omotransversarius
Origin: Distal spina scapulae
Insertion: Caudal ala atlantis
Action: Flex neck laterally, draw shoulder cranially
Innervation: N**ervi accessorious (CN-XI)
Bloodflow: Arteria cervicalis superficialis ramus ascendens
M. latissimus dorsi
Origin: Superficial thoracolumbar fascia Th7 - Th8
Insertion: T**uberositas teres major
Action: Draws limb caudally, flex shoulder
Innervation: N**ervi thoracodorsalis (ex nervi spinalis cervicalis C8)
Bloodflow: Arteria thoracodorsalis
M. pectoralis superficialis
- M. pectoralis descendens
- M. pectoralis transversus
Action: Adducts the forelimb
Innervation: Nervi pectorialis cranialis (ex ramus ventralis of nervis spinales cervicales C7 - C<span>8</span>)
Bloodflow: Arteria thoracica externa and arteria thoracica interna rami perforantes
M. pectoralis descendens
Origin: manubrium sterni
Insertion: Crista tuberculi majoris (of humerus)
M. pectoralis transversus
Origin: Sternebrae 1 - 3
Insertion: Crista tuberculi majoris (of humerus) and fascia antebrachii
List the deep thoracic girdle musculature
- M. pectoralis profundus
- M. subclavius (Ø Ca)
-
M. rhomboideus
- pars capitis (Ca/Su)
- pars cervicis
- pars thoracis
-
M. serratus ventralis
- pars cervicis
- pars thoracis
M. pectoralis profundus
Origin: All sternebrae & costal cartilages of true ribs
Insertion: Tuberculum minus (of humerus)
Action: Supports the trunk, adducts and retracts the forelimb
Innervation: Nervi pectoralis caudalis (ex nervis spinales cervicales C8 - Th1)
Bloodflow: Arteria thoracica externa et interna rami perforantes
M. subclavius
Ø Ca
Origin: Cranial sternum & costal cartilages
Insertion: Epimysium pf m. supraspinatus
Action: Supports the trunk, stabilises the shoulder
Innervation: Nervi pectoralis cranialis (ex ramus ventralis of nervis spinales cervicales C7-C8)
Bloodflow: Arteria thoracica externa et interna rami perforantes
Action of M. rhomboideus
- Elevates the forelimb
- Pulls the scapula agains the trunk
M. rhomboideus pars capitis
Origin: Crista nuchae (of os occipitale)
Insertion: Dorsomedial border of scapula
Innervation: Nervis spinales cervicales C1-C8 rami ventrales
Bloodflow: Arteria cervicalis profunda and arteria cervicalis superficialis
M. rhomboideus pars cervicis
Origin: Median raphe of neck to Th1 - Th3 spinous process’
Insertion: Dorsomedial border of scapula
Action: Supports the trunk, adducts and retracts the forelimb
Innervation: Nervis spinales cervicales C1 - C8 rami ventralis
Bloodflow: Arteria cervicalis superficialis
M. rhomboideus pars thoracis
Origin: Th4 - Th7 spinous process’
Insertion: Dorsomedial border of scapula
Innervation: Nervis spinales cervicales Th1 - Th7 rami ventralis
Bloodflow: Arteria cervicalis superficialis
Action of m. serratus ventralis
- Supports the trunk
- Inspiration
- Carries the shoulder with the forearm
M. serratus ventralis pars cervicis
Origin: C2 - C7 transverse process’
Insertion: Dorsomedial border of scapula
Innervation: Nervis spinales cervicales C1 - C8 rami ventralis
Bloodflow: Arteria cervicalis superficialis
M. serratus ventralis pars thoracis
Origin: Middle of R1-R8
Insertion: Facies serrata scapulae
Innervation: Nervi thoracicus longus (ex nervis spinalis cervicalis C7)
Bloodflow: Arteria subscapularis & arteria thoracica lateralis in Ca
List the pelvic girdle musculature
- M. psoas minor
-
M. iliopsoas
- M. psoas major
- M. iliacus medialis et lateralis
- M. quadratus lumborum
M. psoas minor
Origin: Body of the last few thoracic vertebrae & L1 - L5
Insertion: Tuberculum m. psoas minoris (Eq)
Linea arcuata (Ca)
Near eminentia iliopubica (of os iliaca) (Ru/Su)
Action: Draws pelvis into a deeper position, arches lumbar region
Innervation: Nervi femoralis
Bloodflow: Arteria iliolumbalis
Action and bloodflow of m. iliopsoas
- Draws pelvic limb forward
- Flex hip
- Flex vertebral column
Bloodflow: Arteria iliolumbalis
M. psoas major
Origin: lumbar vertebral body and transverse process’
Insertion: Trochanter minor (of femur)
Innervation: Nervi cutaneus femoris lateralis
M. iliacus medialis et lateralis
Origin: Linea arcuata, lateral border of os iliaca
Insertion: Trochanter minor (of femur)
Innervation: Nervi femoralis
M. quadratus lumborum
Origin: Lumbar vertebrae transverse process’, Last three thoracic vertebrae transverse processes and ribs.
Insertion: Medial surface of ala iliaca
Innervation: Nervi femoralis
Bloodflow: Arteria iliolumbalis
