Mulder J L, Bouma A, Ansink B J
Department of Clinical Psychology, Free University, Amsterdam.
Cortex. 1995 Sep;31(3):487-501. doi: 10.1016/s0010-9452(13)80061-5.
This study was designed to investigate the role of visual sensory deficits and neglect in perceptual categorization deficits in a group of 35 patients with unilateral cerebral lesions. From theoretical point of view, it was expected that right hemisphere lesions would play a critical role in eliciting perceptual categorization deficits which could not be accounted for by visual sensory deficits or neglect. The results revealed that perceptual categorization deficits were not confined to RHD patients, but they were also found in LHD patients. RHD patients were impaired regardless of the nature of the task (verbal vs. nonverbal), while LHD patients were impaired on nonverbal tasks, and in a lesser degree on verbal tasks. In both braindamaged groups, perceptual categorization deficits were highly associated with visual sensory deficits, however, perceptual categorization deficits were also found without impairments in the visual sensory system. Neglect to be less important determinant of perceptual categorization deficits. The present findings are discussed in the light of Warrington's model of object agnosia.
本研究旨在调查35名单侧脑损伤患者视觉感觉缺陷和忽视在知觉分类缺陷中的作用。从理论角度来看，预计右半球损伤在引发无法用视觉感觉缺陷或忽视来解释的知觉分类缺陷中起关键作用。结果显示，知觉分类缺陷并不局限于右半球损伤（RHD）患者，在左半球损伤（LHD）患者中也有发现。无论任务性质如何（言语任务与非言语任务），RHD患者均受损，而LHD患者在非言语任务中受损，在言语任务中受损程度较轻。在两个脑损伤组中，知觉分类缺陷都与视觉感觉缺陷高度相关，然而，在视觉感觉系统无损伤的情况下也发现了知觉分类缺陷。忽视对知觉分类缺陷的决定作用较小。根据沃林顿的物体失认模型对本研究结果进行了讨论。
