Kennedy Paul M, Cressman Erin K, Carlsen Anthony N, Chua Romeo
School of Human Kinetics, The University of British Columbia, Vancouver, British Columbia, Canada.
Neuroreport. 2005 Jul 13;16(10):1097-100. doi: 10.1097/00001756-200507130-00013.
Displacing prisms and galvanic stimulation were used to examine visual-vestibular interactions during target-directed gait. Participants walked towards a wall 6 m away. After taking four steps, a target on the wall, located directly in front or to the right of the participant, was illuminated. Participants continued walking towards the target. Galvanic vestibular stimulation was triggered at either gait initiation, a step before the potential turn, or at target illumination. Although the visual and vestibular perturbations significantly altered gait trajectory, the greatest interaction occurred when galvanic stimulation was triggered one step before the target appeared. This implies an increase in the weighting of vestibular inputs just before turning to prepare for the potential change in direction.
使用移位棱镜和直流电刺激来检查目标导向步态期间的视觉-前庭相互作用。参与者朝着6米外的一堵墙行走。走四步后，位于参与者正前方或右侧墙上的一个目标被照亮。参与者继续朝着目标行走。直流电前庭刺激在步态起始时、潜在转弯前一步或目标照明时触发。尽管视觉和前庭干扰显著改变了步态轨迹，但当在目标出现前一步触发直流电刺激时，相互作用最为显著。这意味着在转向之前前庭输入的权重增加，以准备应对潜在的方向变化。
