exercise 13 gross anatomy of the muscular system
synergists
aid the action of agonists either by assisting with the same movement or by reducing undesirable or unnecessary movement
direction of muscle fibers, muscle size, muscle location, number of origins, location of the attachments, muscle shape, muscle action
factors of naming skeletal muscles
prime movers/agonsts
muscles that are most responsible for producing a particular movement
antagonists
muscles that oppose or reverse movement
a. circular b. convergent c. fusiform d. parallel e. multipennate f. bipennate g. unipennate
patterns of fascicle arrangement in muscles
fixators
specialized synergists that immobilize the origin of a prime mover so that all the tension is exerted at the insertion
orbicularis oris
what muscle are you using to close your lips and pucker up
frontal belly of the epicranius muscle
what muscle are you using to raise your eyebrow to wrinkle your forehead
gluteus maximus
what muscle are you using when are in a deep knee bend and want to extend your thigh to resume upright posture
deltoid
what muscle are you using when you abduct your arm against resistance
triceps brachii
what muscle are you using when you acutely flex at your elbow and then try to extend the forearm against resistance
biceps brachii
what muscle are you using when you attempt to flex your forearm against resistance
orbicularis oculi
what muscle are you using when you blink your eyes or wink
trapezius
what muscle are you using when you elevate your shoulder against resistance
latissimus dorsi
what muscle are you using when you fully abduct the arm and extend at the elbow. Then adduct the arm against resistance
temporalis
what muscle are you using when you place your hands on your temples and clench your teeth
pectoralis major
what muscle are you using when you press your hands together at chest level with your elbows widely abducted