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  • Title: Left hemisphere superiority for visuospatial functions in left-handers.
    Author: Marzi CA, Grabowska A, Tressoldi P, Bisiacchi PS.
    Journal: Behav Brain Res; 1988 Sep 15; 30(2):183-92. PubMed ID: 3166716.
    Abstract:
    Male and female left- and right-handers have been tested with a divided visual field technique on a visuospatial (discrimination of angle width) and on a verbal task (vowel-consonant discrimination) using either a choice or a Go-No-go manual reaction time paradigm. Right-handers showed the expected pattern of hemispheric asymmetries with an advantage of the right hemisphere in the visuospatial task and an advantage of the left hemisphere in the verbal task. Such effects were statistically reliable only in male subjects. Left-handers, on the contrary, showed a different pattern of asymmetries. In the visuospatial task there was an overall superiority of the left hemisphere, while no hemispheric asymmetry was found in the verbal task.
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