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Muscle Actions

QuestionAnswer
buccinator retracts angle of mouth
depressor anguli oris depresses angle of mouth
depressor labii inferioris depresses lower lip
levator labii inferioris elevates upper lip
occiptiofrontalis elevates eyebrows
orbicularis oculi closes eye
orbicularis oris closes lips/mouth
zygomaticus major elevates and abducts upper lip
zygomaticus minor elevates and abducts upper lip
masseter elevates and protracts mandible
temporalis elevates and retracts mandible
sternocleidomastoid flexes and rotates the head and neck
trapezius extends head and neck
external intercostalis elevates ribs (inspiration)
internal intercostalis depresses ribs (expiration)
external abdominal oblique compresses abdomen
internal abdomina oblique compresses abdomen
rectus abdominis flexes waist
transversus abdominis compresses abdomen
coracobrachialis adducts arm; flexes shoulder
deltoid abducts and rotates arm
pectoralis major flexes shoulder; adducts & rotates arm
teres major extends shoulder; medially rotates arm
subscapularis extends shoulder; medially rotates arm
erector spinae extend vertebral column, head & neck
levator scapulae elevates and rotates scapula
pectoralis minor depresses scapula
rhomboideus minor retracts and rotates scapula
rhomboideus major retracts and rotates scapula
serratus anterior protracts and rotates scapula
latissimus dorsi extends shoulder; adducts & rotates arm
infraspinatus extends shoulder; laterally rotates arm
supraspinatus abducts arm
teres minor extends shoulder; abducts & rotates arm
biceps brachii flexes elbow
brachialis flexes elbow
brachiordialis flexes elbow
Created by: SerenityRickmon
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