Neuropsychological Characteristics of Mnestic Activity in Patients With Stroke in the Right (Non-Dominant) Hemisphere

This study presents a neuropsychological analysis of memory impairments in patients with acute ischemic stroke affecting the left (dominant) and right (subdominant) hemispheres of the brain. Aim: Analysis of characteristic changes in memory functions in right-handed patients in the acute period of ischemic stroke with a lesion localized in the subdominant (right) hemisphere of the brain. Materials and Methods: Sixty right-handed patients with confirmed ischemic stroke were examined. The diagnosis and lesion localization were verified by CT and neurological examination. The following neuropsychological tests were used: the "10 words" test, image classification, and paired associations method. The study was approved by the local ethics committee. Results: Patients with lesions in the subdominant hemisphere predominantly exhibited impairments in visual, spatial, logical, and mechanical memory. At the same time, the severity of memory dysfunction was lower in righthemisphere strokes compared to left-hemisphere strokes. Patients with dominant hemisphere damage showed more significant impairments in semantic, mediated, and verbal memory. Additionally, specific patterns of memory deficits were identified depending on the affected brain lobe: parietal, temporal, or occipital.