KN 372: Control Contributions

"A well-substantiated explanation of some aspects of the natural world, based on a body of facts that have been repeatedly confirmed through observation & expirement"
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Terms in this set (15)
"A well-substantiated explanation of some aspects of the natural world, based on a body of facts that have been repeatedly confirmed through observation & expirement"
The Scientific Theory
Pattern of head, body and limb motion relative to environmental objects & events
Coordination
# of independent elements/ components in a control system & # of ways each component can vary
Degrees of freedom
System which all needed info to initiate/carry action as planned is contained in initial instructions to effectors
Open loop control
Order of the open loop control
Input
I
Executive (brain)
I (instructions)
Effector (muscles)
I
Output
Memory representation that stores info needed to perform an action

Prestructured set of commands that defines & shapes action
Motor program
What is the evidence for motor programs?
Rapid mvmt. That doesn't allow sensory feedback
reduced attention while learning
slower RT for complex reactions
successful reactions after deafferentation
Contents of motor control
Specification of primary focal action
Specificatoin of Anticipatory Postural Adjustments (APA)
* postural m. Activation patterns
* anticipation of what task requires
Muscle selection
Duration/timing of contractions
Magnitiude of m. Contractions
M. Control variables
Order of events
relative timing (time between events 1&2)
Invariant features of GMP
T/F Relative timing changesFalse The ratio/duration may increase or decrease but timing never changesT/F Relative force can change depending on the pattern and in handwritingF Force can change due to surface but pattern will stay the sameOverall duration overall force m. SelectionParameters of GMPsT/F Chnaging parameters changes GMPFalseProduce Ryhtimic patterns of notor control neuron activity w/o input from high centers or sensory feedbackCentral pattern generators