The Japanese journal of neuropsychology

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ArticleTitle	Left hand tactile agnosia in a patient with multiple sclerosis
Language	J
AuthorList	Koji Yamada¹⁾, Hiroshi Sugihara¹⁾, Tsutomu Kamo¹⁾, Youichi Takahashi¹⁾, Hiromitsu Sasaki²⁾, Mitsuhumi Abe³⁾
Affiliation	1)Department of Neurology, St. Marianna University School of Medicine Hospital 2)Department of Rehabilitation Medicine, St. Marianna University School of Medicine Hospital 3)Department of Pathology, St. Marianna University School of Medicine Hospital
Publication	Japanese Journal of Neuropsychology: 19 (4), 184-189, 2003
Received	May 7, 2003
Accepted	Jul 22, 2003
Abstract	A 27-year-old right-handed male with multiple sclerosis, who manifested left hand tactile recognition deficits. The patient was diagnosed as left hand tactile agnosia, since he showed difficulty in semantic association of object despite preserved hylognosis and morphognosis. The patient had a lesion in the subcortical region of the right angular gyrus. The case reported by Endo et al. (1992) had a right hand tactile agnosia and reported by Nakamura et al. (1998) had bilateral tactile agnosia. 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.
Keywords	tactile agnosia, multiple sclerosis