Prism Adaptation of Reaching Movements: Specificity for the Velocity of Reaching
Prism Adaptation of Reaching Movements: Specificity for the Velocity of Reaching
复制标题
伸展运动的棱镜适应：伸展速度的特异性
作者：
S. Kitazawa;Tatsuya Kimura;T. Uka
视野被棱镜移动后，准确到达视觉目标的能力会受到干扰，但通过练习可以恢复。当棱镜被移除时，受试者会向与棱镜位移相反的方向误触（后效）。目前的研究表明，后遗症的严重程度取决于视觉位移期间和之后的运动速度。训练有素的受试者需要以四种运动持续时间之一（<300、~800、~2000 和~5000 毫秒）从固定起点到达出现在切线屏幕上随机位置（400 毫米远）的目标。当移除后的移动持续时间与使用棱镜时相同时，后效应的大小最大。随着速度差异变大，它变得更小。当视觉移位后使用对侧手臂时，后遗症并不明显。由于这种适应不能推广到速度或另一只手臂，因此我们推断，潜在的变化发生在从视觉输入到运动输出的转换的后期，其中不仅表示运动的方向，还表示运动的时间相关参数，例如速度、加速度或力。
Accurate reaching toward a visual target is disturbed after the visual field is displaced by prisms but recovers with practice. When the prisms are removed, subjects misreach in the direction opposite to the prism displacement (aftereffect). The present study demonstrated that the severity of the aftereffect depends on the velocity of the movements during and after the visual displacement. Trained subjects were required to reach with one of four movement durations (<300, ∼800, ∼2000, and ∼5000 msec) from a fixed starting point to a target that appeared at a random location on a tangent screen (400 mm away). The size of the aftereffect was largest when the movement after the removal was performed with the same duration as that performed with the prisms. It became smaller as the difference in velocity became larger. When the contralateral arm was used after visual displacement, the aftereffect was never significant. Because the adaptation does not generalize across velocities or to the other arm, we infer that the underlying changes occur at a later stage in the transformation from visual input to motor output, in which not only the direction but also the time-dependent parameters of movements, such as velocity, acceleration or force, are represented.
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DOI：
10.1113/jphysiol.1985.sp015566
发表时间：
1985
期刊：
The Journal of physiology
影响因子：
--
作者：
Gibson,AR;Houk,JC;Kohlerman,NJ
通讯作者：
Kohlerman,NJ
影响因子：
2.5
作者：
vanKan,PL;Houk,JC;Gibson,AR
通讯作者：
Gibson,AR
绘画运动期间的运动皮层活动：双纽带追踪期间的群体代表性。
DOI：
10.1152/jn.1999.82.5.2705
发表时间：
1999
期刊：
Journal of neurophysiology.
影响因子：
--
作者：
Schwartz,AB;Moran,DW
通讯作者：
Moran,DW
影响因子：
56.9
作者：
BIZZI, E;MUSSAIVALDI, FA;GISZTER, S
通讯作者：
GISZTER, S
影响因子：
3.7
作者：
ASHE, J;GEORGOPOULOS, AP
通讯作者：
GEORGOPOULOS, AP