Schnider A, Benson D F, Scharre D W
Department of Neurology, UCLA School of Medicine.
Cortex. 1994 Sep;30(3):445-57. doi: 10.1016/s0010-9452(13)80340-1.
A patient with left infero-medial occipital-temporal infarct suffered a visual agnosia that, by a minor change of the task, could be manipulated to optic aphasia. Tools in actual use and pantomimes of tool use were better named than stationary tools, a dissociation that suggests differences in the ability of stimuli to evoke associations over multiple modalities. Based on this case and analysis of previous reports we suggest that optic aphasia differs from visual agnosia primarily in the degree of callosal disconnection and that the preserved demonstration of tools use and semantic classification of optic aphasia reflect right hemisphere contribution to visual processing.
一名患有左枕颞下内侧梗死的患者出现了视觉失认症，通过对任务进行微小改变，可将其转变为视觉性失语。与静止工具相比，实际使用中的工具及工具使用的手势能被更好地命名，这种分离表明不同刺激在多种感觉通道上唤起联想的能力存在差异。基于该病例及对既往报告的分析，我们认为视觉性失语与视觉失认症的主要区别在于胼胝体离断的程度，而视觉性失语中保留的工具使用演示和语义分类反映了右半球对视觉加工的贡献。
