EDKP 447 Lecture Notes - Lecture 13: Brainstem, Proprioception, Hamstring
21 Dec 2017
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*apr adaptable depending on = a) initial position & b) platform width & biomechanical conditions: initial position. Apr = adaptable depending on initial position ex: backward perturbation activate diff muscles. Ex: standing without support = apr activate all posterior muscles from trunk to leg. Ex: on 4 paws = apr activate arm & leg muscles but no trunk. Ex standing holding on support *larger base of support. = apr only activate bicep/deltoid & no activation of trunk/back muscle: platform width. Ex: wide vs narrow beam activate diff muscles. Ex: standing on moving platform - either narrow vs wide. Ex: if adapt apr = move from narrow to wider platform without noticing. Quickly adapt from trial to trial from hip strategy to ankle strategy by quick change in sensory. Input from narrow to wide beam but some muscle responses can take longer to adjust. A) force of voluntary disturbance & b) support during disturbance: force of voluntary disturbance.
