09152011 - PLAN OF ACTION(SET OF INSTRUCTIONS PARAMETERS overall duration overall force specific muscles SCHEMA THEORY Rule or set of rules defines

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Motor Control Theories
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What is a theory and why is it important? What is behavioral motor control? What is motor coordination? What are “degrees of freedom” in motor control?
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OPEN LOOP vs CLOSED LOOP CONTROL COMMAND ACTION COMMAND ACTION FEEDBACK
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TOTE FEEDBACK TEST OPERATE INPUT EXIT + -
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TOTE FEEDBACK TEST OPERATE INPUT EXIT + -
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What are “degrees of freedom” in motor control? BIOMECHANICS - number of possible movements, joint by joint CONTROL - number of control elements THE HUMAN BODY HAS ABOUT 100 JOINTS THE HUMAN BODY HAS ABOUT 800 MUSCLES THE HUMAN BODY HAS HUNDREDS OF THOUSANDS OF MOTOR UNITS
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How many biomechanical degrees of freedom are in the arm of a football quarterback, from shoulder to hand? A = < 5 B = 5-8 C = 9-12 D = 13-15 E = > 15
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How many biomechanical degrees of freedom are involved in performing YOUR skill? A = < 6 B = 7-12 C = 13-18 D = 19-24 E = > 24
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GENERALIZED MOTOR PROGRAM PLAN OF ACTION (SET OF INSTRUCTIONS) INVARIANT FEATURES order (sequence) relative timing relative force
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GENERALIZED MOTOR PROGRAM
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Unformatted text preview: PLAN OF ACTION (SET OF INSTRUCTIONS) PARAMETERS overall duration overall force specific muscles SCHEMA THEORY Rule or set of rules defines a set of movements Central storage of abstract representations Select initial response (open loop) and “parameterize” or adjust parameters using feedback (closed loop) DYNAMIC PATTERN THEORY Complex system nonlinear analysis Systems have stable states (attractors) defined by system characteristics such as mechanics and loop delay times Systems are “self-organizing”, reducing control complexity DYNAMIC PATTERN THEORY Order parameters are variables defining overall behavior Control parameters are variables that can change to adjust movement for desired goal DPT suggests that control of complex systems may be simplified because some degrees of freedom are coupled or linked automatically For Next Class Sensory Contributions to Motor Performance CHAPTER 6...
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This note was uploaded on 09/28/2011 for the course KIN 315 taught by Professor Abraham during the Spring '08 term at University of Texas at Austin.

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09152011 - PLAN OF ACTION(SET OF INSTRUCTIONS PARAMETERS overall duration overall force specific muscles SCHEMA THEORY Rule or set of rules defines

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