A+P Lab: Muscles of upper body: name, origin, insertion, action

Sternocleidomastoid

Sternocleidomastoid action

Flexion of neck

Sternocleidomastoid origin

manubrium of sternum

Sternocleidomastoid insertion

mastoid process

Pectoralis major

Pectoralis major action

Flexion

Pectoralis major origin

medial half (sternal end) of clavicle

Pectoralis major insertion

intertubercular groove of the humerus

trapezius

trapezius action

retraction of scapula

trapezius origin

occipital and spinous processes of C7-T12

trapezius insertion

spine of scapula

deltoid

deltoid action

aids flexion, extension, rotation of arm

deltoid origin

spine of scapula

deltoid insertion

deltoid tuberosity of humerus

latissimus dorsi

latissimus dorsi action

* extension

latissimus dorsi origin

aponeurosis from T7 to posterior 3rd of iliac crest

latissimus dorsi insertion

intertubercular groove of humerus

rhomboids

rhomboids action

retraction

rhomboids origin

spinous process C7-T5

rhomboids insertion

vertebral (medial) border of scapula

teres major

teres major action

medial rotation

teres major origin

inferior angle of scapula

teres major insertion

inter tubercular groove of humerus

supraspinatus

supraspinatus action

stabilizes shoulder joint

supraspinatus origin

supraspinous fossa of scapula

supraspinatus insertion

greater tubercle of humerus

infraspinatus

infraspinatus action

stabilizes shoulder joint

infraspinatus origin

infraspinous fossa of scapula

infraspinatus insertion

greater tubercle of humerus

teres minor

teres minor action

stabilizes shoulder joint

teres minor origin

lateral border of scapula

teres minor insertion

greater tubercle of humerus

subscapularis

subscapularis action

stabilizes shoulder joint

subscapularis origin

subscapular fossa of scapula

subscapularis insertion

lesser tubercle of humerus

biceps brachii

biceps brachii action

flexion of elbow

biceps brachii origin

short head: coracoid process of scapula

biceps brachii insertion

radial tuberosity

triceps brachii

triceps brachii action

extension of elbow, aids in adduction of humerus

triceps brachii origin

lateral head: upper posterior humerus

triceps brachii insertion

olecranon process of ulna

brachioradialis

brachioradialis action

flexes elbow

brachioradialis origin

upper, lateral supracondylar ridge of humerus

brachioradialis insertion

styloid process of radius

pronator teres

pronator teres action

pronation of forearm, flexes elbow

pronator teres origin

medial epicondyle of humerus

pronator teres insertion

lateral shaft of radius

serratus anterior

serratus anterior origin

outer anterior surface of upper 8 ribs

serratus anterior action

protraction of scapula

serratus anterior insertion

medial border of scapula