BIOL 210 C - Face & Torso (Muscle Models)

epicranius - frontal belly

orbicularis oculi

orbicularis oris

raises eyebrows, wrinkles forehead

closes eye, blinking, squinting

closes and purses lips

temporalis

epicranius - occipital belly

zygomaticus

risorius

elevates mandible

pulls scalp posteriorly

raises lateral corners of mouth in smiling

draws corner of lip laterally

masseter

sternocleidomastoid

elevates mandible

flexes head when both sides are contracted; rotates head to opposite shoulder when only one side is contracted

deltoid

pectoralis major

serratus anterior

abduction of humerus (arm)

flexes humerus (arm)

protracts scapula (moves it forward)

rectus abdominis

external oblique

flexes and rotates vertebral column

flexes and rotates vertebral column

internal intercostals

external intercostals

depresses rib cage (during forced exhalation)

elevates rib cage (during inspiration)

deltoid

pectoralis major

serratus anterior

pectoralis minor

abduction of humerus (arm)

flexes humerus (arm)

protracts scapula (moves it forward)

protracts scapula (moves it forward)

rectus abdominis

external oblique

internal oblique

flexes and rotates vertebral column

flexes and rotates vertebral column

flexes and rotates vertebral column

deltoid

trapezius

latissimus dorsi

abduction of humerus (arm)

extends head; retracts scapula (moves it backward); elevates clavicle

extends humerus (arm); adduction of humerus (arm)

infraspinatus (rotator cuff)

teres minor (rotator cuff)

teres major

lateral rotation of humerus (arm)

lateral rotation of humerus (arm)

medial rotation of humerus (arm); elevates humerus (arm); adduction of humerus (arm)

infraspinatus

teres minor

teres major

lateral rotation of humerus (arm)

lateral rotation of humerus (arm)

medial rotation of humerus (arm); elevates humerus (arm); adduction of humerus (arm)

supraspinatus

infraspinatus

teres minor

teres major

abduction of humerus (arm)

lateral rotation of humerus (arm)

lateral rotation of humerus (arm)

medial rotation of humerus (arm); elevates humerus (arm); adduction of humerus (arm)

deltoid

infraspinatus

latissimus dorsi

abduction of humerus (arm)

extends head; retracts scapula (moves it backward); elevates clavicle

extends humerus (arm); adduction of humerus (arm)

infraspinatus

teres minor

teres major

lateral rotation of humerus (arm)

lateral rotation of humerus (arm)

medial rotation of humerus (arm); elevates humerus (arm); adduction of humerus (arm)

rhomboid minor

rhomboid major

retracts scapula (moves it backward)

retracts scapula (moves it backward)

trapezius