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17 Cards in this Set
- Front
- Back
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Tendency trade-off
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tendency to substitute accuracy for speed, or vice versa.
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Fitt's Law
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mathematical formula to estimate the movement time of a given task.
MT = a+b log2(2D/W) MT=movement time a and b are constants D=distance W=width |
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index of difficulty
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Measurement of difficulty of a given task based on the distance from and width of the target.
log2(2D/W)=ID |
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Prehension
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term used for reaching for and grasping objects.
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3 distinct components of prehension:
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transport
grasp object manipulation |
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Prehension is different from reaching and pointing...
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because of object manipulation.
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Synergist
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one structure aids in the action of another.
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Transport + grasp =
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synergistic coupling
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Transport and grasp characteristics are influenced by...
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object manipulation.
What are you going to do with the object once you have grasped it? |
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Prehension demonstrates the importance of...
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an understanding of motor control.
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Practical application for prehension practice:
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must be functional
reach, grasp, and manipulate a variety of objects cannot separate the three components |
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Handwriting
motor equivalence |
variation between individuals
similarity within individuals |
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Handwriting
several control processes involved |
what you write and how you write it.
Cognitive and motor systems (lexical, semantic, grammatical, motor) |
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Bimanual Coordination Skills
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Two limbs prefer to do the same thing at the same time.
More difficult tasks influence less difficult tasks. Unclear how bimanual coordination is controlled. |
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Gait
Central pattern generators (CPG) in spinal cord |
Theory similar to a motor program, but for genetically defined activities.
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Gait
Rhythmic relationships |
leg-leg
arms-legs pelvis-trunk |
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Gait
Walk to run transition occurs at... |
higher speed than run to walk.
No physical limitation to walkng at fast speeds. |
