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A&P lab exam II

muscle & action

masseter closes jaw, elevates mandible
temporalis closes jaw, elevates & retracts mandible
orbicularis oculi closes eye, blinkin, squinting
orbicularis oris closes mouth, purses & protrudes lips
sternocleidomastoid both sides together -> neck flexion acting independently -> rotates head toward opposite shoulder
trapezius elevate, medially rotate, retract, depress scapula
deltoid princliple abductor of the arm
latissimus dorsi extend, adduct, medially rotate arm
suprasinatus initiate abduction of arm
infraspinatus laterally rotate arm
teres minor laterally rotate arm
teres major medially rotate, adduct, extend arm
subscapularis medially rotate arm
rhomboideus minor retract, elevate, laterally rotate scapula
rhomoideus major retract elevate laterally rotate scapula
erector spinae exten vertebral column
external oblique flex & rotate vertebral column, increase abdominal pressure
internal oblique flex & rotate vertebral column, increase abdominal pressure
rectus abdominus flex & rotate vertebral column, increase abdominal pressure
transversus abdominus increase abdominal pressure
pectoralis major flex, adduct, medially rotate arm
pectoralis minor depress, protract, laterally rotate scpula
serratus anterior protract scapula (prevents winging)
coracobrachialis flex shoulder
biceps brachii flex elbow, supinate forearm
brachialis flex elbow
brachioradialis flex elbow
triceps brachii extend elbow
anterior compartment of forearm flex & pronate wrist & hand
posterior compartment of forearm extend & supinate wrist & hand
gluteus maximus extends, laterally rotates, adbucts thigh
sartorius flex, abduct thigh, flex knee
gracilis adduct thigh flex knee
biceps femoris extend thigh flex knee
semimembranosus extend thigh flex knee
semitendinosus extend thigh flex knee
rectus femoris extend knee, flex thigh
vastus lateralis, medialis, & intermedius extend knee
gastrocnemius platarflex foot
soleus plantarflex foot
tibialis anterior dorsiflex foot
Created by: midnight1854