Nakamura J, Endo K, Sumida T, Hasegawa T
Department of Neuropsychology, Izu Nirayama Rehabilitation Hospital, Shizuoka, Japan.
Cortex. 1998 Jun;34(3):375-88. doi: 10.1016/s0010-9452(08)70761-5.
This study reports a 64-year-old right-handed male who manifested bilateral tactile recognition deficits. They were diagnosed as bilateral tactile agnosia, since the patient showed difficulty in semantic association of objects despite preserved hylognosis and morphognosis. The patient had a bilateral lesion in the subcortical region of the angular gyrus. The case reported by Endo et al. (1992) had a right hand tactile agnosia due to a subcortical lesion in the left angular gyrus. Our findings support Endo's hypothesis that tactile agnosia occurs when the somatosensory association cortex is disconnected from the semantic memory store located in the inferior temporal lobe by a subcortical lesion of the angular gyrus. We suggest that the extent of the lesion in the tactual-semantic pathway is related to the severity of tactile agnosia and the types of the tactile naming errors.
本研究报告了一名64岁的右利手男性，他表现出双侧触觉识别缺陷。他们被诊断为双侧触觉失认症，因为尽管患者的物体材质认知和形态认知能力保留，但在物体语义联想方面存在困难。该患者在角回的皮质下区域有双侧病变。远藤等人（1992年）报告的病例因左侧角回的皮质下病变而患有右手触觉失认症。我们的研究结果支持远藤的假设，即当体感联合皮层通过角回的皮质下病变与位于颞下叶的语义记忆库断开连接时，就会发生触觉失认症。我们认为，触觉-语义通路中病变的范围与触觉失认症的严重程度以及触觉命名错误的类型有关。
