A new paradigm to investigate the roles of head and eye movements in the coordination of whole-body movements
A new paradigm to investigate the roles of head and eye movements in the coordination of whole-body movements
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DOI：
10.1007/s00221-003-1718-8
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发表时间：
2004-01-01
影响因子：
2
通讯作者：
Bronstein, AM
中科院分区：
文献类型：
--
作者：
Hollands, MA;Ziavra, NV;Bronstein, AM
虽然以前的研究已经证明了眼睛和头部在凝视转移过程中存在协调运动，但还没有人研究过凝视转移过程中不同身体部分的时间和空间特征，这需要全身运动。如果没有这些信息，就不可能确定眼球运动控制系统和负责移动身体其他部位的运动控制系统之间的相互作用的程度。本文详细分析了受试者(N=5)眼睛、头部、上半身和脚在身体旋转时与偏心位置(45度、90度和135度，中心左右)的光信号对准的时间和运动学特征。对于所有的旋转幅度，都有一个清晰的身体部分方向(眼睛、头部、上半身和脚)的顺序，这与以前关于运动转向的研究一致，并且眼睛和所有身体部分的起始潜伏期时间之间存在显著的相关性。在所有运动幅度中，脚和眼睛在空间中的时间排列的运动学轮廓之间也有显著的相关性。足部相对于头部以及足部相对于上半身的移位轮廓的相关性程度明显较低。这些发现表明，在一种新的全身旋转范例中，眼睛和脚的协调程度很高，并提供了证据，表明负责移动双脚的运动系统的输出受到负责产生和协调眼睛和头部运动到外围靶点的运动系统的严重影响。
Although previous studies have demonstrated the existence of coordinated eye and head movements during gaze shifts, none has studied the temporal and spatial characteristics of the various body segments during gaze transfers that require whole body movements. Without this information it is not possible to determine the extent of the interaction between the oculomotor control system and the motor control systems responsible for moving other body parts. Presented here is a detailed analysis of the timing and kinematic characteristics of participants' (N=5) eye, head, upper body and feet during rotation of their body to align with light cues positioned at eccentric locations (45, 90, and 135degrees, left and right of centre). For all rotation amplitudes there was a clear sequence of body segment orientation (eye, head, upper body and feet) consistent with previous studies of locomotor steering and significant correlations between the onset latency times of the eyes and all body segments. There were also significant correlations between temporally aligned kinematic profiles of the feet and the eye in space for all movement amplitudes. The extent of correlation was significantly lower for displacement profiles of the feet versus head and of the feet versus upper body. These findings demonstrate substantial eye-foot coordination during a novel whole-body rotation paradigm and provide evidence that the output of the motor systems responsible for moving the feet is heavily influenced by the motor systems responsible for generating and coordinating eye and head movements to peripheral targets.