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Prime Mover (Agonist)
Muscles that have the primary responsibility for producing movement.
Antagonists
Muscles that oppose or reverse the action of the prime mover.
Synergists
Help prime movers by adding extra force to the movement.
Fixators
Immobilize a bone so the muscle has a stable base.
Muscles are named based off of _.
Location, shape, size, direction of fibers, number of origins, location of attachments, and action/type of movement.
Circular Muscle
Encircle body tubes or external body openings.
AKA Sphincter Muscle
Convergent Muscles
Fascicles converge to a narrow attachment.
Triangular shape.
Parallel Muscles
Long, strap-like muscles with parallel fascicles.
Pennate ¨Feather-like¨ Muscles
Shape allows a lot of fibers for great strength.
Origin
Fixed or immovable end of a muscle.
Insertion
Movable end of a muscle.
Note
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