Ackroyd Katie, Riddoch M Jane, Humphreys Glyn W, Nightingale Simon, Townsend Stella
Brain and Behavioural Sciences Centre, School of Psychology, University of Birmingham, Birmingham B15 2TT, UK.
Neurocase. 2002;8(1-2):1-12. doi: 10.1093/neucas/8.1.1.
We report evidence that visual representations of space close to the body can be extended when a patient uses a tool to explore the environment. HB had severe neglect of left and far spatial regions which was determined more by how locations were visually perceived than by how they were represented tactilely or through proprioception. His ability to detect visual targets in left and far space was improved, however, when he held a tool. He also had limited tactile/proprioceptive knowledge about the location of his hand. These data suggest that by holding a tool, HB's more intact representation of near, visual space could be extended to include stimuli presented at a distance from his body. This extension of space improved his detection of visual stimuli. We discuss the implications of the results for the nature of our internal representation of space.
我们报告了证据，表明当患者使用工具探索环境时，靠近身体的空间视觉表征可以得到扩展。HB严重忽视左方和远处的空间区域，这更多地取决于位置在视觉上的感知方式，而非通过触觉或本体感觉的呈现方式。然而，当他手持工具时，他在左方和远处空间检测视觉目标的能力有所提高。他对手部位置的触觉/本体感觉知识也有限。这些数据表明，通过手持工具，HB对近处视觉空间更完整的表征可以扩展到包括来自身体一定距离处呈现的刺激。这种空间扩展提高了他对视觉刺激的检测能力。我们讨论了这些结果对我们内部空间表征本质的影响。
