Visual selection and action in Balint's syndrome

Martin Edwards, Glyn Humphreys

Research output: Contribution to journalArticle

10 Citations (Scopus)


We examined the relations between attention and action in a patient with Balint's syndrome following bilateral damage involving the parietal lobes. The first two experiments used prolonged stimulus exposures and showed that unlike normals, the patient GK made independent actions to bilateral stimuli, even when explicitly instructed to make coordinated reaches. In contrast, bimanual actions to a single stimulus were coordinated in time. Experiments 3 and 4 employed reduced stimulus exposures to produce visual extinction. We found comparable extinction effects in detection and action, along with improved bimanual movements when the stimuli were grouped by collinearity and surface contrast, plus better coordination with bilateral stimuli proximity. The results are discussed in relation to the common role of visual selection processes in perception and action.
Original languageEnglish
Pages (from-to)445-462.
Number of pages18
JournalCognitive Neuropsychology
Issue number5
Publication statusPublished - 1 Jul 2002


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