Pizzamiglio L, Frasca R, Guariglia C, Incoccia C, Antonucci G
Dipartimento di Psicologia, Università degli Studi di Roma, La Sapienza.
Cortex. 1990 Dec;26(4):535-40. doi: 10.1016/s0010-9452(13)80303-6.
Three groups of subjects, normal controls, right brain damaged patients with and without heminattention, were required to bisect a line in presence of a fixed or a moving background. The stimulus moving horizontally toward the left or the right induced an optokinetic nystagmus with a slow phase coherent with the direction of the movement: together with the optokinetic nystagmus, a displacement of the subjective midpoint, as compared to the condition with a fixed background, was observed in all three groups of subjects. Within the right brain damaged with heminattention the displacement of the line bisection was great for stimuli moving toward the right, but a significant reduction of the left bias was present. In the same group of patients the effect of the optokinetic stimulation was present in a very large proportion of cases and proved to be relatively stable in a test-retest presentation. Theoretical relevance of these data and their potential importance for rehabilitation are discussed.
三组受试者，即正常对照组、伴有和不伴有偏侧疏忽的右脑损伤患者，被要求在固定或移动背景下平分一条线。水平向左或向右移动的刺激会诱发视动性眼球震颤，其慢相与运动方向一致：与固定背景条件相比，在所有三组受试者中均观察到主观中点的位移，同时伴有视动性眼球震颤。在伴有偏侧疏忽的右脑损伤患者中，当刺激向右移动时，线平分的位移很大，但左偏倚明显减少。在同一组患者中，视动刺激的效果在很大比例的病例中存在，并且在重测时被证明相对稳定。讨论了这些数据的理论相关性及其在康复中的潜在重要性。
