Dynamic coordination of body parts during prism adaptation
Dynamic coordination of body parts during prism adaptation
复制标题
DOI：
10.1152/jn.2002.88.4.1685
复制
发表时间：
2002-10-01
影响因子：
2.5
通讯作者：
Thach, WT
中科院分区：
文献类型：
--
作者：
Martin, TA;Norris, SA;Thach, WT
我们研究了在适应棱镜投掷过程中身体各部分的协调。人类受试者在佩戴横向移动棱镜眼镜之前、期间和之后向目标投掷球。头部、肩部、手臂和球的位置连续录像。我们计算了眼睛顶着头、头顶着躯干、躯干顶着手臂和手臂顶着球的身体角度。在每个被试中，适应过程中的注视距离调整分布在所有耦合的身体部位。在单个会话中，各个抛出之间的耦合分布不可预测地发生了变化。耦合体间的角变化通常显著大于靶命中的角变化。因此，耦合的身体部位相互依赖地改变，以解释球的高精度。主成分和蒙特卡罗分析显示，投掷时身体角度的可变性在受试者之间具有广泛的可变性/刻板印象。数据支持一个动态和广义的解决方案的模型，证明了分布的目光投掷调整在身体部位。
We studied coordination across body parts in throwing during adaptation to prisms. Human subjects threw balls at a target before, during, and after wearing laterally shifting prism eyeglasses. Positions of head, shoulders, arm, and ball were video-recorded continuously. We computed body angles of eyes-in-head, head-on-trunk, trunk-on-arm, and arm-on-ball. In each subject, the gaze-throw adjustment during adaptation was distributed across all sets of coupled body parts. The distribution of coupling changed unpredictably from throw to throw within a single session. The angular variation among coupled body parts was typically significantly larger than angular variation of on-target hits. Thus coupled body parts changed interdependently to account for the high accuracy of ball-on-target. Principal components and Monte Carlo analyses showed variability in body angles across throws with a wide range of variability/stereotypy across subjects. The data support a model of a dynamic and generalized solution as evidenced by the distribution of the gaze-throw adjustment across body parts.