anatomy lecture pectoral girdle & scapula

trapezius actions

superior fibers : elevate and superiorly rotate scapula

middle fibers : retract scapula

inferior fibers : depress scapula

trapezius innervation

accessory nerve (CN XI)

levator scapulae action

elevates, & inferiorly rotates scapula

levator scapulae insertion

superior medial border of scapula

levator scapulae innervation

dorsal scapular nerve

rhomboids actions

elevates, retracts & inferiorly rotates scapula

rhomboid major insertion

medial border of scapula

rhomboid minor

superior medial border of scapula

rhomboid innervation

dorsal scapular nerve

pectoralis minor actions

protracts & depresses scapula

pectoralis minor insertion

coracoid process of scapula

pectoralis minor innervation

medial pectoral nerve

serratus anteior actions

protracts, superiorly rotates scapula & stabilizes scapula

serratus anterior insertion

anterior medial border of scapula

serratus anterior innervation

long thoracic nerve

subclavius actions

stablize & depress clavicle

subclavius innervation

nerve to subclavius

latissimus dorsi actions

handcuff muscles

latissimus dorsi insertion

intertubercular groove of humerus

latissimus dorsi innervation

thoracodorsal nerve

pectoralis major actions

arm flexion, adducts & medially rotates GH

pectoralis major insertion

deltoid actions

anterior fibers : flex & medially rotate GH

middle fibers : GH abduction

posterior fibers : extend & laterally rotate GH

deltoid innervation

axillary nerve

coracobrachialis actions

adducts & flexes GH joint

coracobrachialis origin

coracoid process

coracobrachialis insertion

middle medial shaft of humerus

coracobrachialis innervation

musculocutaneous nerve

teres major actions

handcuff muscles

teres major origin

inferior lateral border & inferior angle of scapula

teres major insertion

lesser tubercle & intertubercular groove of humerus

teres major innervation

lower subscapular nerve

subscapularis actions

medially rotates & stabilizes GH joint

subscapularis origin

subscapular fossa

subscapularis insertion

lesser tubercle of humerus

supraspinatus actions

abducts and stabalizes GH joint

supraspinatus origin

supraspinous fossa

supraspinatus insertion

greater tubercle of humerus

subscapularis innervation

upper & lower sub scapular nerves

supraspinatus innervation

suprascapular nerve

infraspinatus innervation

suprascapular nerve

infraspinatus actions

adduct, laterally rotate & stabilize GH joint

infraspinatus origin

infraspinous fossa

infraspinatus insertion

greater tub. of humerus

teres minor innervation

axillary nerve

teres minor actions

adduct, laterally rotate & stabilize GH joint

teres minor origin

superior lateral border of scapula

teres minor insertion

greater tubercle of humerus