Atlas of Human Anatomy by Netter

scapula of greater

tubercle of

humerus

nerve (C5,C6) rotator cuff muscles

Infraspinatus Intraspinous fossa of

scapula

Middle facet of

greater

tubercle of

humerus

Suprascapular

nerve (C5,C6)

Suprascapular arteryLateral rotation of arm (with teres

minor)

Teres minor Upper two thirds of

posterior surface of

lateral border of

scapula

Inferior facet

of greater

tubercle of

humerus

Posterior

branch of

axillary nerve

(C5,C6)

Circumflex scapular

artery

Lateral rotation of arm, adduction

Teres major Posterior surface of

inferior angle of

scapula

Medial lip of

intertubercular

sulcus

Inferior

subscapular

nerve (C5,C6)

Circumflex scapular

artery

Adducts and medially rotates arm

SubscapularisSubscapular fossa Lesser

tubercle of

humerus

Superior and

inferior

subscapular

nerves (C5-C6)

Subscapular artery,

lateral thoracic artery

Medially rotates arm and adducts

it; helps hold humeral head in

glenoid cavity

Superficial extrinsic (Join axial skeleton to the appendicular skeleton)

Trapezius

Latissimus dorsi

Deep extrinsic

Levator scapulae

Rhomboid major and minor

Intrinsic

Deltoid: Gives shoulder its rounded appearance, abducts arm past 15 degrees

Teres major: Adducts and medially rotates arm

Teres minor: Hidden by deltoid, assists lateral rotation of arm and adduction

Supraspinatus: Initiates arm abduction

Infraspinatus: Laterally rotates arm

Subscapularis: Primary medial rotator of the arm, also adducts

Rotator cuff

Four of scapulohumeral muscles

Supraspinatus

Infraspinatus

Teres minor

Teres major

Form musculotendinous cuff around glenohumeral joint

Blend with articular capsule to reinforce it

Hold head of humerus in glenoid cavity

Axilla