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MUSCLES: ACTIONS AND MOVEMENTS

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Term
Definition
abductor   A muscle that moves a part away from the midline or midsagittal plane of the body (raising your arm away from the body)  
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adductor   A muscle that moves a part towards the midline or midsagittal plane of the body (lowering your arm back against the body)  
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levator   a muscle that rasies a body part  
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depressor   a muscle that lowers a body part  
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flexor   a muscle that bends a limb at a joint  
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extensor   a muscle that straightens (stretches out) a limb or joint  
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supinator   a muscle that produces the motion of supination (e.g. turning the palm and forearm upward)  
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pronator   a muscle that produced motion of pronation (e.g. turning the palm and forearm downward)  
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evertor   a muscle that turns a body part outward  
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invertor   a muscle that turns a body part inward  
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rotator   a muscle that rotates or revolves a body part on its axis  
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elevation   the act of raising or lifting up a body part  
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buccinator   muscle of the cheek used to compress the cheek as occurs in whistling and blowing; the trumpeter muscle  
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masseter   the principle chewing muscle  
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risorius   muscle that draws the angle or corner of the mouth outward and upward; the laughing muscle  
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Created by: Wolkowski
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