PEDS203 Chapter 4: Chapter 4 - Movement Production And Motor Programs
Document Summary
Oct 13 chapter 4 movement production and motor programs. Closed-loop control system y motor program: open loop control system. Open-loop control system y open-loop control = involves the use of centrally determined (prestructured) commands sent to the effector system and executed without feedback. Characteristics of open-loop y advanced instructions (sequence and timing) y no feedback (reflexive) Inflexible to unexpected changes y y no in progress modification y tasks: rapid, discrete, predictable environment y general examples will be ballistic skills. Bouncing a ball will involve both open and closed loop feedback. Lines of evidence for mp s y rt and movement complexity (henry and rogers) y dafferentation experiments (removing any possible feedback) polit and bizzi y mechanically blocking a limb (wadman) Rt and movement complexity (henry and rogers) y finger life 150 ms y ball grasp 195 ms y double ball strike 208 ms y variable response programming.