Karnath H O
Department of Clinical Neurology and Neurophysiology, University of Freiburg, F.R.G.
Neuropsychologia. 1988;26(1):27-43. doi: 10.1016/0028-3932(88)90028-0.
Three patients with right-sided lesions and, in two cases, clinically manifest neglect had to compare and to name stimuli presented tachistoscopically either bilateral-simultaneously or unilaterally in the LVF and/or RVF. Whereas there was no difference between unilateral LVF and RVF presentation, "extinction" of the LVF on bilateral stimulation occurred in both the acute and recovered stages. This deficit could be compensated by reducing information analysis in the RVF, thereby provoking covert shifting of attention to the LVF. The results suggest a common mechanism underlying visual neglect and "extinction" with three components--two affecting the directionally specific covert orienting and shifting of attention and one affecting the directionally non-specific processing of information by sequential analysis. The course of recovery is determined by improvement in the directionally specific shifting of attention.
三名右侧脑部有损伤的患者，其中两例临床上表现出疏忽症状，他们需要比较并说出通过速示器呈现的刺激物的名称，这些刺激物要么双侧同时呈现，要么单侧在左视野和/或右视野呈现。虽然单侧左视野和右视野呈现之间没有差异，但在急性和恢复阶段，双侧刺激时左视野的“消弱”都会出现。这种缺陷可以通过减少右视野中的信息分析来弥补，从而促使注意力向左侧视野隐蔽转移。结果表明，视觉疏忽和“消弱”背后存在一种共同机制，该机制有三个组成部分——两个影响注意力的定向特异性隐蔽定向和转移，另一个影响通过顺序分析对信息进行的定向非特异性处理。恢复过程取决于注意力定向特异性转移的改善。
