AOIIs Upper Muscles

masseter origin

zygomatic arch

masseter insertion

angle and ramus of mandible

sternocleidomastoid origin

manubrium and sternal end of clavicle

sternocleidomastoid insertion

mastoid process

trapezius origin

external occipital protuberance; superior nuchal line; spinous processes of C7-T12

trapezius insertion

clavicle; acromion process; spine of scapula

deltoid origin

clavicle; acromion process; spine of scapula

deltoid insertion

deltoid tuberosity

biceps brachii origin

supraglenoid tubercle; coracoid process

biceps brachii insertion

radial tuberosity

triceps brachii origin

infraglenoid tubercle; posterior shaft of humerus

triceps brachii insertion

olecranon process

extensor digitorum origin

lateral epicondyle of humerus

extensor digitorum insertion

digits 2-5

flexor digitorum superificialis origin

medial epicondyle of humerus

flexor digitorum superficialis insertion

digits 2-5

anterior compartment of arm action

flexion at shoulder and elbow joint

posterior compartment of arm action

extension at shoulder and elbow joint

anterior compartment of forearm action

flexion at wrist and digits

posterior compartment of forearm action

extension at wrist and digits

musculocutaneous nerve innervation

anterior compartment of arm

median nerve innervation

anterior compartment of forearm and thenar region

ulnar nerve innervation

hand, except thenar region

axillary nerve innervation

shoulder

radial nerve innervation

posterior compartments of arm and forearm