Interactive effects of age and aphasia: With special emphasis on nonlinguistic cognitive abilities.:With Special Emphasis on Nonlinguistic Cognitive Abilities

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The relationship between the age-at-onset of aphasia and relevant clinical variables (i. e., concomitant impairment of nonlinguistic congnitive abilities, type of aphasia, lesion localization, type of cerebrovascular disease and years of education) was investigated in 90 aphasic patients and 72 age and education matched controls. All the subjects were right handed and had at least 6 years of education. All the aphasic patients had unilateral left-hemisphere lesions caused by cerebrovascular disease.When the performance levels on 4 nonlinguistic cognitive tests developed by Benton were compared between the two groups, the decrease became more prominent for aphasic patients in older age groups compared to age and education matched controls. When the aphasic group was divided into two subgroups by age-at-onset (younger than 59 years and older than 60 years), type of aphasia and lesion localization revealed age-related differences between the two subgroups. A multivariate analysis revealed that aphasia type and lesion localization had high loadings on the severity of aphasia followed by the impairment of nonlinguistic cognitive abilities and age.
社団法人日本リハビリテーション医学会の論文