Muscles of Head, Neck, Thorax, & Upper Extremities Lab 3

orbicularis oculi

temporoparietalis

frontalis (frontal belly)

#7

nasalis

orbicularis oris

depressor labii inferioris

levator labii superioris

depressor anguli oris

risorius

zygomaticus major

zygomaticus minor

occipitalis (occipital belly)

sternocleidomastoid

Origin of sternocleidomastoid

manubrium/clavicle

Insertion of sternocleidomastoid

mastoid process

Action of sternocleidomastoid

flexion/lateral rotation of the head

trapezius

pectoralis major

pectoralis minor

pectoralis major

Origin of pectoralis major

clavicle/sternum/costal cartilages

Insertion of pectoralis major

greater tubercle of the humerus

Action of pectoralis major

flexes/medially rotates/adducts arm

pectoralis minor

serratus anterior

serratus anterior

lotissinus dorsi

deltoid

Origin of deltoid

clavicle/acromion/spine of scapula

Insertion of deltoid

deltoid tuberosity of humerus

Action of deltoid

abducts the arm

supraspinatus

infraspinatus

teres minor

subscapularis

teres major

teres minor

infraspinatus

supraspinatus

subscapularis

short head of biceps

long head of biceps

biceps brachii

Origin of short head of biceps

corocoid process

Origin of long head of biceps

supraglenoid tubercle

Insertion of biceps brachii

radial tuberosity

Action of biceps brachii

flexes/supinates the arm

coraco brachialis

brachialis

lateral head of triceps

long head of triceps

medial head of triceps

lateral head of triceps

long head of triceps

medial head of triceps

Origin of long head of triceps

infraglenoid tubercle

Origin of lateral head of triceps

posterior shaft of humerus

Origin of medial head of triceps

posterior shaft of humerus

Insertion of triceps brachii

common tendon onto olecranon process

Action of triceps brachii

extends forearm

palmaris longus

flexor carpi radialis

pronator teres

flexor carpi ulnaris

flexor digitorum superficialis

flexor digitorum profundus

flexor carpi ulnaris

pronator quadratus

flexor pollicis longus

brachioradialis

extensor digiti minimi

extensor carpi ulnaris

anconeus

extensor digitorum communis

extensor carpi radialis brevis

extensor carpi radialis longus

brachioradialis

supinator

abductor pollicis longus

extensor pollicis brevis

extensor pollicis longus

extensor indicis

opponens pollicis

abductor pollicis brevis

flexor pollicis brevis

adductor pollicis

flexor digiti minimi

abductor digiti minimi