Verbal learning and memory following stroke
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Objective: The research examined whether verbal learning and memory impairment previously observed 1 year after left hemisphere stroke endures over a longer period and whether stroke sufferers compensate for their impairments using working memory. Methodology: Twenty-one persons with left hemisphere lesions; 20 with right hemisphere lesions only and 41 matched controls completed the Hopkins Verbal Learning Test-Revised (HVLT-R), a working memory test (Letter-Number Sequencing, LNS) and the Boston Naming Test (BNT). Results: Persons with left hemisphere damage performed more poorly on HVLT-R than controls. They showed poorer immediate recall, delayed recall, recognition and learning, but intact retention, suggesting an encoding impairment. BNT and LNS scores predicted recall in this group. HVLT-R performance of persons with right hemisphere lesions only was comparable to controls. BNT (not LNS) predicted recall in these groups. Conclusions: Persons with left hemisphere damage relied more on working memory and recruited diverse left hemisphere regions to compensate for their impaired encoding. Implications: Tasks requiring verbal encoding and memory are effortful following left hemisphere stroke. This should be recognized and accommodated.
Copyright 2014 Informa Healthcare. This is an electronic version of an article published in Brain Injury, Vol. 28(4), 2014, pp. 442-447. Brain Injury is available online at: http://informahealthcare.com with the open URL of your article.
Medical and Health Sciences not elsewhere classified