The Japanese journal of neuropsychology

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ArticleTitle	A case of transcortical sensory aphasia with delayed verbal perseveration
Language	J
AuthorList	Itaru Tamura¹⁾³⁾, Mika Otsuki¹⁾, Yoshitsugu Nakagawa²⁾, Fumio Moriwaka¹⁾, Kunio Tashiro³⁾
Affiliation	¹⁾Department of Communication Disorders, School of Psychological Science, Health Sciences University of Hokkaido ²⁾Department of Clinical Social Work, School of Nursing and Services, Health Sciences University of Hokkaido ³⁾Hokuyukai Neurology Hospital
Publication	Japanese Journal of Neuropsychology: 25 (3), 228-236, 2009
Received	Dec 22, 2008
Accepted	Mar 26, 2009
Abstract	In this report, we present a case of transcortical sensory aphasia with the delayed verbal perseveration following the left frontal lesion. The patient was a 66-year-old right handed woman admitted to our hospital with a complaint of language disorder. Spontaneous speech as well as repetition was preserved and articulation was normal. The agrammatisme and the palilalia were not observed. The language comprehension was severely affected even for the auditory comprehension of common words. This patient was considered to present the typical characteristics of transcortical sensory aphasia. She also showed an executive dysfunction associated with the frontal lesion. A major deficit of this case was seen in confrontation naming; delayed irrelevant perseverated responses were reoccurred in a set of one hundred items. In category fluency test, the patient was unable to retrieve words and perseverated verbal responses were found in the second or in the third categories. The perseveration of a series of perseverated verbal responses was reproduced after several days. These symptoms suggested that the stuck-in-set type perseveration was a core impairment of this patient. We considered that there was deficit, not only in an inhibition of prior responses but also in an activation of the semantic field for the target word. This case study would suggest that the frontal lobe could be regarded as a control system with regulation of word retrieval.
Keywords	transcortical sensory aphasia, frontal lesion, delayed perseveration, stuck-in-set, irrelevant paraphasia