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21 Cards in this Set
- Front
- Back
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Difference between mobility and stability?
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mobility- tends to rotate
stability- translatory |
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Proximal verses distal stabilization-
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The body likes proximal stability and distal mobilization.
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Agonist-
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Muscle or group of joint movement (posture). Usually the muscle that is acting.
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Antagonist
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possess opposite anatomical action of agonist ( usually not one not contracing)
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Synergist
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muslces acting as the same tim as agonists but function to stabilize or neutralize
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Spurt Muscles
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mobile for torque. (proximal attachment is farthest from joint)
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Shunt Muscles
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stabile for translatory motion (proximal attachment is closest to joint)
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Agonist Antagonist reversal
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- agonist is reversed midway through the movement. Due to COG vectors.
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eccentric contraction
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lengthing
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What type of contraction produces the greatest force?
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eccentric
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Name three isokenetic mechanisms
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1. fixed velocity, varying resistance
2. reistance is dependant upon your effort 3. resistance is parallel to the lever arm |
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Define Strength
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- ability to produce force and active tension
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Passive tension component of strength
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when you reach end of toe region and take it into plastic or elastic region
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4 Things strength is dependant on
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1. muscle size
2. architeture 3. length tension relationship 4. age/gender |
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What is a muscle fiber
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cell
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Functional Motor Unit =
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alpha motoernueron from ventral horn or spinal cord and all the muscle fibers it innervates.
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Explain; Motor unit function is asynchromous
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the greater the demand imposed onthe muscle, the more motor units are recruited.
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Active tension =
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contraction due to cross bridge formation
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Passive tension is developed by:
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noncontractile components of the muscles connective tissue.
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Active Insufficiency =
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reduced tension developing capacity. Why you can make a good fist with the wrist extremly flexed or extended
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Passive insufficiency
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joint movement is limited due to the muscle that is antagonist to desired action reaching irs end range of extensibility
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