Διακρατικό ΠΜΣ Κλινική Νευροψυχολογία-Νοητικές Νευροεπιστήμες
Library of the School of Health Sciences

2018-07-10

2018

Despoti Akyllina Anna

Κωνσταντίνος Πόταγας, Αναπληρωτής Καθηγητής, Ιατρική, ΕΚΠΑ
Ιωάννης Ευδοκιμίδης, Ομότιμος, Ιατρική, ΕΚΠΑ
Ιωάννης Ζαλώνης, Αναπληρωτής Καθηγητής, Ιατρική, ΕΚΠΑ

Verbal and visuospatial working memory deficits in left and right hemisphere stroke

English

Verbal and visuospatial working memory deficits in left and right hemisphere stroke

Background: The traditional view dictates that the left hemisphere is dominant for processing verbal stimuli, while the right hemisphere is mainly involved in processing visuospatial stimuli. Nevertheless, contemporary research evidence indicates the existence of modality-independent deficits following lateralized lesions.
Aim: This study aims to investigate verbal and visuospatial working memory (WM) deficits after left and right hemisphere stroke.
Methods & Procedures: 50 patients (13 women) suffering from left-hemisphere stroke (LHS), and 16 patients (8 women) suffering from right-hemisphere stroke (RHS) and 42 healthy persons as a control group were recruited. Working memory was assessed with Digit span and Corsi-Block Tapping task for the verbal and visuospatial modality respectively.
Outcomes & Results: Results revealed differences between the two groups for verbal WM, but not for visuospatial WM. Indeed, with regard to digit span, while LHS were inferior to RHS, both groups were found impaired. With regard to Corsi-block tapping task, both patients’ groups found to be impaired, even though there were no differences between the two groups. In both groups, most impaired patients demonstrated modality-independent WM deficits.
Conclusions: Results indicated that both LHS and RHS patients demonstrate WM deficits in the verbal and the visuospatial modality, and that different WM impairment profiles can be observed independently of lesion lateralization. These results suggest that lateralized lesions may result in modality-independent WM deficits, and further support the notion of a bilateral, widely distributed network supporting working memory.

Health Sciences

Left hemisphere stroke, Right hemisphere stroke, Working memory, Verbal modality, Visuospatial modality, Digit Span, Corsi Block-Tapping task

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https://pergamos.lib.uoa.gr/uoa/dl/object/2777735