Thoracic muscles
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12 Terms
latissimus dorsi
Attachments: proximal caudal humorous and thoracolumbar fascia
Action: retraction of the limb
Vascularization:
innervation: pectorales caudales and thoracodorsalis
Internal intercostal muscles
Attachments: cranial rib to caudal prior rib
Action: pull ribs together, expiration
Vascularization: ventral and dorsal intercostal branches
Innervation: Intercostal nerves (ventral branch from ventral root)
External intercostal muscles
Attachments: caudal border of rib to cranial of next
Action: pulls ribs together to enlarge cavity, inspiration
Vascularization: ventral and dorsal intercostal branches
Innervation: intercostal nerves
Superficial pectoral
Attachments: cranial aspect of sternum and humorous
Action: adduction of limb
Vascularization:
Innervation:
Deep pectoral
Attachment: Proximal humorous and sternum caudal to superficial pectorals
Action: limb adduction
Vascularization:
Innervation:
External abdominal oblique
Attachments: Linea alba and thoracolumbar fascia
Action: flexion of vertebral column
Vascularization:
Innervation: intercostal nerves
Internal abdominal oblique
Attachments: thoracolumbar fascia caudal to last rib and linea alba
Fiber direction: Cranioventrally
Action: compression and support of abdominal viscera, expiration
Vascularization:
Innervation: Medial branches intercostal nerves
Rectus abdominus
Attachments: pelvis
Action:
Vascularization:
Innervation:
Transverse Abdominus
Attachments: thoracolumbar fascia and linea alba
Action: compression and support of abdominal viscera, expiration
Vascularization: dorsal branches
Innervation: Medial branches intercostal nerves
scalenus
Attachments: transverse process of cervical vertebrae 4 to 7 and lateral surface ribs 1-8
Action: inspiration, displace ribs cranially
Vascularization:
Innervation:
Diaphragm
Attachments: L3, costal arch, xiphoid process
Action: Respiration
Vascularization: phrenic artery
Innervation: Phrenic nerve (from ventral branches of 5,6,7 cervical nerves)
serratus ventralis
Attachments:
Action:
Vascularization:
Innervation: