Superficial Muscles Of The Anterior And Posterior Thorax Flashcards
Insertion of pectoralis minor
Coracoid process of scapula
Origin of pectoralis minor
Anterior surfaces of ribs 3-5
Action of pectoralis minor
With ribs fixed, draws scapula forward and rotates scapula downward
Innervation of pectoralis minor
Medial and lateral pectoral nerves
Origin of serratus anterior
By a series of muscle slips from ribs 1-8
Insertion of serratus anterior
Entire anterior surface of vertebral border of scapula
action of serratus anterior
Rotates scapula upward so that its inferior angle moves laterally and upward; holds scapula
Innervation of serratus anterior
Long thoracic nerve
Origin of subclavius
Costal cartilage of rib 1
Insertion of subclavius
Groove on inferior surface of clavicle
Action of subclavius
Helps stabilize and depress pectoral girdle
Innervation of subclavius
Nerve to subclavius
Origin of trapezius
Occipital bone, ligamentum nuchae, and spines of c7 and all thoracic vertebrae
Insertion of trapezius
A continuous insertion along acromion and spine of scapula and lateral third of clavicle
Action of trapezius
Stabilizes, raises, retracts, and rotates scapula
Innervation of trapezius
Accessory nerve
Origin of Levator scapulae
Transverse processes of c1-c4
Insertion of Levator scapulae
Medial border of the scapula, superior to the spine
Action of Levator scapulae
Elevates and Adducts scapula
Innervation of Levator scapulae
Cervical spinal nerves and dorsal scapular nerve
Origin of rhomboids
Spinous processes of c7 and t1 (minor) and spinous processes of t2-t5 (major)
Insertion of rhomboids
Medial border of scapula
Action of rhomboids
Stabilize scapula
Innervation of rhomboids
Dorsal scapular nerve
