The hemispheric specialization for processing visual stimuli as a function of spatial-frequency content and semantic category was investigated. Spatially filtered pictures of animals and tools were displayed to both hemifields at nine levels of spatial-frequency filtering following a coarse-to-fine design. Results showed a differential hemispheric specialization in relation to the semantic category of stimuli. Animals might be identified at low spatial frequencies (coarse information) in a similar extent in both hemifield conditions, while a hemispheric dissociation was found for tools (the increasing of levels of high-spatial frequency information was especially needed when such stimuli were presented to the left visual field/right hemisphere (RH) relative to that for right visual field/left hemisphere presentations).
Hemispheric asymmetry for spatially filtered stimuli belongin to different semantic categories / M.P. VIGGIANO; A. COSTANTINI; M. VANNUCCI; S. RIGHI. - In: COGNITIVE BRAIN RESEARCH. - ISSN 0926-6410. - STAMPA. - 20:(2004), pp. 519-524. [10.1016/j.cogbrainres.2004.03.010]
Hemispheric asymmetry for spatially filtered stimuli belongin to different semantic categories.
VIGGIANO, MARIA PIA;VANNUCCI, MANILA;RIGHI, STEFANIA
2004
Abstract
The hemispheric specialization for processing visual stimuli as a function of spatial-frequency content and semantic category was investigated. Spatially filtered pictures of animals and tools were displayed to both hemifields at nine levels of spatial-frequency filtering following a coarse-to-fine design. Results showed a differential hemispheric specialization in relation to the semantic category of stimuli. Animals might be identified at low spatial frequencies (coarse information) in a similar extent in both hemifield conditions, while a hemispheric dissociation was found for tools (the increasing of levels of high-spatial frequency information was especially needed when such stimuli were presented to the left visual field/right hemisphere (RH) relative to that for right visual field/left hemisphere presentations).File | Dimensione | Formato | |
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