Origins, Terminations, Actions Delt-Anconeus

Deltoideus

Origin: spine of scapula and acromion

Deltoideus

Termination: bones of skull

deltoideus

action: flex humeral jt.

Supraspinatus

origin: supraspinous fossa of scapula

Supraspinatus

termination: greater tubercle of humerus

Supraspinatus

action: extend humeral joint

infraspinatus

origin: infraspinous fossa of scapula

infraspinatus

termination: also greater tubercle of the humerus

infraspinatus

action: flex humeral joint; adduct limb at humeral joint

teres minor

origin: caudal border of scapula

teres minor

action: flexes the humeral joint

subscapularis

origin: subscapular fossa of scapula

subscapularis

termination: lesser tubercle of humerus

subscapularis

action: adduct limb at humeral joint

teres major

origin: also caudal border of scapula

teres major

action: also flexes the humeral joint

coracobrachialis

origin: coracoid process of scapula

coracobrachialis

termination: lesser tubercle of humerus

coracobrachialis

action: adduct limb at shoulder

biceps brachii

origin: supraglenoid tubercle

biceps brachii

action: flex the cubital joint and extend the humeral joint

brachialis

action: flex the cubital joint

triceps brachii

origin: caudal border of scapula (long head); proximal humerus (other heads)

triceps brachii

termination: olecranon

triceps brachii

action: extend the cubital joint (all heads); flex humeral joint (long head)