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10 Cards in this Set
- Front
- Back
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Muscles that hold one bone in place relative to the body while a usually more distal bone is moved are called ___________. |
Fixators |
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The origin of a _________ is often stabilized by_______, so that its action occurs at its _______. |
prime mover, fixators, point of insertion |
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The muscles of the scapula act as _____ to hold the scapula in place while other muscles _____ to move the humerus. |
fixators, contract |
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In the body, the joints function as_____, and the bones function as ______. |
Fulcrums, levers |
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A _____ is a rigid shaft capable of turning about a hinge, or pivot point, called a _____ and transferring a force applied at one point along the lever to a ______, or resistance, placed at another point along the lever. |
Lever, fulcrum (F), weight (W) |
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When muscles contract, the ______, or force, of muscle contraction is applied to the levers (bones), causing them to move. |
pull (P) |
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What are the three classes of levers based on the relative positions of the levers, fulcrums, weights, and forces? |
Classes I, II, and III
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The levator palpabrea superioris _________. |
Raises the upper lids. |
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A droopy eyelid on one side is called___. |
ptosis |
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What does ptosis usually indicate? |
That the nerve to the levator palpebrae superioris, or the part of the brain controlling that nerve, is damaged. |
