Shoulder JOINT origin + insertion + muscle action + nerve innervation

anterior deltiod- origin

lateral 3rd clavicle

anterior deltoid- insertion

deltoid tuberosity

anterior deltoid- action

flexion + internal rotation + shoulder abduction + horizontal adduction

anterior deltoid- nerve innervation

axillary nerve

medial deltoid- origin

acromion process

middle deltoid- insertion

deltoid tubersoity

middle deltoid- action

shoulder abduction

middle deltoid- nerve innervation

axillary nerve (c5,c6)

posterior deltoid- origin

spine of scapula

posterior deltoid- insertion

deltoid tuberosity

posterior deltoid- action

shoulder abduction + extension + external rotation + horizontal abduction

posterior deltoid- nerve innervation

axillary nerve (c5,c6)

biceps brachii- origin

long head- supraglenoid tubercle of scapula

short head- coracoid process of scapula

biceps brachii- insertion

radial tuberosity

biceps brachii- action

shoulder + elbow flexion + supination

biceps brachii- nerve innervation

musculocutaneous nerve (c5,c6)

coracobrachialis- origin

coracoid process

coracobrachialis- insertion

medial humerous

coracobrachialis- action

shoulder flexion + adduction

coracobrachialis- nerve innervation

musculocutaneous nerve (c5,c6)

pec major- origin

clavicle + sternum

pec major- insertion

bicipital groove of humerous

pec major- action

flexion + adduction + internal rotation

pec major- nerve innervation

medial + lateral pectoral nerves