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11 Cards in this Set
- Front
- Back
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Prime movers, agonists |
Muscles most responsible for producing a particular movement |
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Antagonists |
Muscles that oppose or reverse a movement |
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Synergists |
Aid the action of agonists either by assisting with the same movement or by reducing undesirable or unnecessary movement - Ex: Making a fist without bending the wrist |
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Fixators |
Fixation muscles are specialized synergists. Immobilize the origin of the prime mover so that all the tension is exerted at the insertion. Ex: Muscles that help maintain posture |
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Criteria on which skeletal muscles are named |
- Direction of muscle fibers - Relative size of the muscle - Location of the muscle - Number of origins - Location of the muscle's origin and insertion - Shape of the muscle - Action of the muscle |
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Direction of muscle fibers |
Rectus (straight) Transverse/Oblique (fibers run at right angles or obliquely) |
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Relative size of the muscle |
Maximus (Largest) Minimus (smallest) Longus (long) Brevis (short) |
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Number of origins |
Ceps (bicepts, triceps, quadriceps) |
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Location of the muscle's origin and insertion |
- Sternocleidomastoid (sterno - sternum; cleido - clavicle) (mastoid process) |
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Shape of the muscle |
Deltoid (triangle) Trapezius (Trapezoid) |
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Action of the muscle |
Adductor muscles - adduction Extensor muscles - extension |
