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12 Cards in this Set
- Front
- Back
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fibrous joints |
no movement skull |
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cartilaginous |
limited movement intervertebral disks
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synovial joints |
allow substanial movement elbow, knee sports movements occur through these joints the most |
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Classification of joints by movements |
uniaxial biaxial; wrist and ankle multiaxialle; hip and shoulder |
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concentric muscle action |
a muscle action in which the muscle SHORTENS bc the contractile force is greater than the resistive force
upward motion of bicep curl |
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eccentric muscle action |
a muscle action in which the muscle lengthens because the contractile force is less than the resistive force.
release or downward motion of bicep curl |
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isometric muscle action |
a muscle action in which the muscle length does not change because the contractile force is equal to the resistive force. |
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isotonic muscle action |
the tension in the muscle remains content despite a change in muscle length
can only occur when a muscle's maximal force of contration exceeds the total load on the muscle. |
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isokenetic muscle action |
movement takes place at a constant speed
used to test and improve muscle strength and endurance, popularly used for after injury |
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two major types of fiber arangements |
parallel and pennate |
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parallel muscles |
fibers are arranged parallel to the length of the muscle
good for speed
produce a greater ROM than similar sized muscles with a pennate arrangement |
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pennate muscles |
have shorter fibers that are arranged obliquely to their tendons i
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