PRAC.12 Flashcards
muscles of the thoracic girdle (except m. sternocleidomastoideus) nn. pectorales craniales nn. pectorales caudales n. thoracicus longus n. thoracicus lateralis n. thoracodorsalis
M. latissimus dorsi
Origin: Fascia thoracolumbalis, last few ribs
Insertion: Tuberositas teres major
Action: Draw limb caudally, flex shoulder
M. trapezius pars cervicalis
Origin: Median raphe of neck
Insertion: Spina scapulae
Action: Draw limb cranially, elevate forelimb
M. trapezius pars thoracica
Origin: Lig. supraspinatus
Insertion: Spina scapulae
Action: Draw limb cranially, elevate forelimb
M. pectoralis superficialis pars descendens
Origin: Manubrium sterni
Insertion: Crista tuberculi majoris, crista humeri
Action: Draw limb cranially/caudally, adduct forelimb
M. pectoralis superficialis pars transversus
Origin: Sternebrae 1-3
Insertion: Crista tuberculi majoris, crista humeri
Action: Draw limb cranially/caudally, adduct forelimb
M. omotransversarius
Origin: Spina scapulae, fascia brachii
Insertion: Ala atlantis
Action: Draws shoulder cranially
M. omotransversarius
Origin: Spina scapulae, fascia brachii
Insertion: Ala atlantis
Action: Draws shoulder cranially
M. pectoralis profundus
Origin: All sternebrae et cartilago costales of costae verae
Insertion: Tuberculum minus, (tuberculum majus)
Action: Draw limb caudally, support trunk
M. rhomboideus pars capitis
Origin: Crista nuchae
Insertion: Margo dorsalis and dorsomedial surface of scapula
Action: Elevate forelimb, pull scapula against trunk
M. rhomboideus pars cervicis
Origin: Raphe of neck, processus spinosus of Th1-Th3
Insertion: Margo dorsalis and dorsomedial surface of scapula
Action: Elevate forelimb, pull scapula against trunk
M. rhomboideus pars thoracis
Origin: Processus spinosus of Th4-Th7
Insertion: Margo dorsalis and dorsomedial surface of scapula
Action: Elevate forelimb, pull scapula against trunk
M. serratus ventralis cervicis
Origin: Processus transversus of C2-C7
Insertion: Facies serrata of scapula
Action: Support trunk, inspiration
M. serratus ventralis thoracis
Origin: Rib 1-8
Insertion: Facies serrata of scapula
Action: Support trunk, inspiration
N. thoracicus longus innervates…
M. serratus ventralis
N. thoracodorsalis
- Originates from C8
- Innervates: m. latissimus dorsi
M. serratus ventralis cervicis
Origin: Processus transversus of C2-C7
Insertion: Facies serrata of scapula
Action: Support trunk, inspiration
N. pectorales craniales
- From C6-C8
- Innervates: m. pectorales superficialis
- Located between descending and transverse superficial pecs.
- ’Points’ toward the transverse
Nn. pectorales caudalis
- From C8-T2
- Supplies: m. pectoralis profundus et ascendens
-
Located under the descending superficial pectoral
- Dig through the deep pectoral
N. thoracicus lateralis
- From C8-T1
- Innervates: m. cutaenus trunci
- Located between mm. pectorales and latissimus dorsi
