The Japanese journal of neuropsychology

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ArticleTitle	The noun-verb double dissociation observed in aphasics' naming
Language	J
AuthorList	Toru Takizawa¹⁾, Kimiko Asano¹⁾, Toshiya Murai³⁾, Toshihiko Hamanaka⁴⁾, Susumu Morimune²⁾
Affiliation	1) Department of Speech Therapy, Kyoto Municipal Rehabilitation Center for Handicapped. 30, Mibusennencho, Nakagyoku, Kyotoshi, 604-8854, Japan 2) Department of Neurology of Kyoto Municipal Rehabilitation Center for Handicapped 3) Department of Neuropsychiatry, Kyoto University 4) Department of Neuropsychiatry, Nagoya City University
Publication	Japanese Journal of Neuropsychology: 18 (2), 84-91, 2002
Received	Jan 20, 1999
Accepted	Nov 29, 2001
Abstract	We administered a noun and verb naming task to aphasic patients with more impairment for noun or verb retrieval. They were selected on the basis of the Standard Language Test of Aphasia (SLTA) or their spontaneous speech. The result showed that six patients had a significant advantage for nouns and five patients for verbs. This noun-verb double dissociation was thought to be indicated that nouns and verbs might be independantly represented in lexical sysytem and might be selectively impaired in speech production of aphasic patients. It is reported that selective impairment for nouns is found in fluent aphasic patients and selective impairment for verbs in non-fluent aphasic patients, especially, Broca aphasic patients with agrammatism. Our result didn't necessarily support such a report. A patient with Wernicke's aphasia was included in the group with selective impairment for verbs, which suggested that all selective impairment for verbs wasn't correlated with agrammatism.
Keywords	noun-verb retrieval, double dissociation, selective impairment for noun or verb retrieval, agrammatism