Endo K, Miyasaka M, Makishita H, Yanagisawa N, Sugishita M
Department of Neuropsychology, Kakeyu Hospital Rehabilitation Center, Nagano, Japan.
Cortex. 1992 Sep;28(3):445-69. doi: 10.1016/s0010-9452(13)80154-2.
Two patients with tactile naming disorders are reported. Case 1 (right hand tactile agnosia due to bilateral cerebral infarction) differentiated tactile qualities of objects normally, but could neither name nor categorize the objects. Case 2 (bilateral tactile aphasia after operation of an epidural left parietal haematoma) had as severe a tactile naming disturbance as Case 1, but could categorize objects normally, demonstrating that tactile recognition was preserved. Case 1 may be the first case of tactile agnosia clearly differentiated from tactile aphasia. CT scans of Case 1 revealed lesions in the left angular gyrus, and in the right parietal, temporal, and occipital lobes. Case 2 had lesions in the left angular gyrus and of posterior callosal radiations. Our findings suggest that tactile agnosia appears when the somatosensory association cortex is disconnected by a subcortical lesion of the angular gyrus from the semantic memory store located in the inferior temporal lobe, while tactile aphasia represents a tactual-verbal disconnection.
报告了两名患有触觉命名障碍的患者。病例1（因双侧脑梗死导致右手触觉失认症）能够正常区分物体的触觉特性，但既不能说出物体的名称，也不能对物体进行分类。病例2（硬膜外左顶叶血肿手术后出现双侧触觉失语症）的触觉命名障碍与病例1一样严重，但能够正常对物体进行分类，这表明触觉识别功能得以保留。病例1可能是第一例明确与触觉失语症区分开来的触觉失认症病例。病例1的CT扫描显示左侧角回以及右侧顶叶、颞叶和枕叶有病变。病例2的病变位于左侧角回和胼胝体后辐射区。我们的研究结果表明，当体感联合皮层因角回的皮质下病变而与位于颞下回的语义记忆库断开连接时，就会出现触觉失认症，而触觉失语症则代表触觉与言语的断开连接。
