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Alpha Oscillatory Imbalance Predicts Attention Deficits in Visuospatial Neglect

Abstract Background and Objectives Visuospatial neglect (VSN) is a common consequence of unilateral stroke, characterized by reduced awareness on the contralesional side of space. This study examines resting-state electrophysiological mechanisms underlying VSN, with a focus on interhemispheric differences in alpha-band oscillations and their association with deficits in visual perception and attention. Methods Resting-state EEG was recorded during three-minute eyes-closed and eyes-open periods in VSN patients. Participants also completed a battery of perceptual and attentional assessments, including the Star Cancellation Task, the Computerized Visual Detection Task, and the Line Bisection Task. Measures of alpha activity, specifically amplitude, peak frequency, and fronto-parietal connectivity,were compared between VSN patients and age- and gender-matched healthy controls. Within the VSN group, alpha activity in the lesioned …

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