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Article type: Research Article
Authors: Michel, François | Henaff, Marie-Anne
Affiliations: Institut des Sciences Cognitives, CNRS. Lyon, France | U 280 INSERM, Lyon, France
Note: [] Corresponding author: F. Michel, U 280 Inserm, 151 cours A. Thomas, Lyon, 69008, France. Tel.: +33 0472681916
Abstract: Following bi-parietal lesions patient AT showed a severe inability to relocate her attention within a visual field which perimetry proved to be near-normal. An experimental approach with tasks testing visuo-spatial attention demonstrated a shrinkage of A.T.'s attentional visual field. With her visual attention narrowed to a kind of functional tunnel vision, the patient exhibited simultanagnosia (Wolpert, 1924), a symptom previously described in 1909 by Balint under the label of Psychic paralysis of "Gaze". In striking contrast AT showed an efficient and effortless perception of complex natural scenes, which, according to recent work in normal subjects, necessitate few if any attentional resources.
Keywords: Balint's syndrome, visual attention, attentional visual field, bilateral neglect
Journal: Behavioural Neurology, vol. 15, no. 1-2, pp. 3-13, 2004
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