de Grave Denise D J, Brenner Eli, Smeets Jeroen B J
Faculty of Human Movement Sciences, Research Institute MOVE, VU University Amsterdam, Amsterdam, The Netherlands.
Exp Brain Res. 2009 Mar;193(3):421-7. doi: 10.1007/s00221-008-1638-8. Epub 2008 Nov 15.
Recently, Gonzalez et al. (J Neurophys 95:3496-3501, 2006) reported that movements with the left hand are more susceptible to visual size illusions than are those with the right hand. We hypothesized that this might be because proprioceptive information about the position of the left hand is less precise. If so, the difference between the hands should become clearer when vision of the hand is removed so that subjects can only rely on proprioception to locate their hand. We tested whether this was so by letting right-handed subjects make open-loop pointing movements within an illusory context with and without vision of their hand. On average, the illusion influenced the left and the right hand to the same extent, irrespective of the visibility of the hand. There were some systematic differences between the hands within certain regions of space, but these were not consistent across subjects. We conclude that there is no fundamental difference between the hands in susceptibility to the Brentano illusion.
最近，冈萨雷斯等人（《神经生理学杂志》95:3496 - 3501，2006年）报告称，与右手运动相比，左手运动更容易受到视觉大小错觉的影响。我们推测这可能是因为关于左手位置的本体感觉信息不够精确。如果是这样，当去除手部视觉，使得受试者只能依靠本体感觉来定位手部时，两只手之间的差异应该会变得更加明显。我们通过让右利手受试者在有或没有手部视觉的错觉情境中进行开环指向运动，来测试情况是否如此。平均而言，无论手部是否可见，错觉对左手和右手的影响程度相同。在空间的某些区域，两只手之间存在一些系统性差异，但这些差异在不同受试者之间并不一致。我们得出结论，在对布伦塔诺错觉的易感性方面，两只手之间没有根本差异。
