Pectoral Region Flashcards
Origin, Insertion, Action, Innervation of Pec Major
O: Clavicular head on anterior surface of medial half of clavicle; Sternocostal head on anterior surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique
I: Lateral lip of inter tubercular sulcus of humers
A: Adducts and medially rotates humerus; draws scap anteriorly/inferiorly
I: Lateral and medial pectoral nerves
Origin, insertion, action, innervation of Pec Minor
O: Ribs 3-5 near their costal cartilages
I: Medial border and superior surface of coracoid process of scapula
A: Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall
I: Medial pectoral nerve (C8, T1)
Origin, insertion, action, innervation of Subclavius
O: Junction of 1st rib and its costal cartilage
I: Inferior surface of middle third of clavicle
A: Anchors and depresses clavicle
I: Nerve to subclavius (C5, C6)
O.I.A.I. of Serratus Anterior
O: external surfaces of lateral parts of ribs 1-8
I: anterior surface of medial border of scapula
A: protracts scapula and holds it against thoracic wall; rotates scapula
I: Long thoracic nerve (C5, C6, C7)
O.I.A.I. of Latissimus Dorsi
O: spinous processes of inferior 6 thoracic vertebrae, thoracolumbar fascia, iliac crest, inferior 3/4 ribs
I: floor of inter tubercular sulcus of humerus
A: extends, adducts, and medially rotates humerus; raises body toward arms during climbing
I: Thoracodorsal nerve (C6, C7, C8)
O.I.A.I. of Teres Major
O: posterior surface of inferior angle of scapula
I: medial lip of inter tubercular sulcus of humerus
A: adducts and medially rotates the arm
I: lower subscapular nerve (C5, C6)
O.I.A.I. of Subscapularis
O: Subscapular fossa
I: lesser tubercle of humerus
A: medially rotates arm, helps hold humeral head in glenoid cavity
I: upper and lower subscapular nerves (C5, C6, C7)
Origin of rhomboid minor
C7 and T1 spinous processes and nuchal ligament
Insertion of Serratus Anterior
Anterior surface medial border of scapula
Boundaries of deltopectoral triangle
Superior: clavicle
Medial: Pec major
Later: deltoid
Nerve innervation of latissimus dorsi
Thoracodorsal N. C6, 7, 8
Nerve innervation of levator scapulae
C3, C4, and dorsal scapular N. C5
The first part of the axillary artery makes what branch?
Superior thoracic artery
The axillary artery is the continuation of what artery?
Subclavian artery
The Long Thoracic Nerve innervates what muscle?
Serratus Anterior
