Functional hemispheric asynchrony: an optical imaging study

Poster

Liu, Guang Bin and Pettigrew, John. 2002. "Functional hemispheric asynchrony: an optical imaging study." 22nd Annual Meeting of the Australian Neuroscience Society (ANS 2002). Sydney, Australia Mar 2002 Sydney.
Paper/Presentation Title

Functional hemispheric asynchrony: an optical imaging study

Presentation TypePoster
AuthorsLiu, Guang Bin (Author) and Pettigrew, John (Author)
Number of Pages1
Year2002
Place of PublicationSydney
Web Address (URL) of Paperhttps://www.ans.org.au/resources/past-ans-conferences/ans-past-conferences/
Conference/Event22nd Annual Meeting of the Australian Neuroscience Society (ANS 2002)
Event Details
22nd Annual Meeting of the Australian Neuroscience Society (ANS 2002)
Event Date
Mar 2002
Event Location
Sydney, Australia
Abstract

Interhemispheric rivalry theory describes a phenomenon in that alternating period of functional dominance and suppression exists between two hemispheres. It is important to elucidate the relationship between the binocular rivalry and the interhemispheric functional asynchrony. Optical imaging of intrinsic signals was used to simultaneously investigate the interhemispheric neuronal activity variations in several parietal cortical areas bilaterally so that the spatial and temporal variations of the optical signals and the functional interdependence between those areas could be evaluated. Two rhythmic components, low frequency oscillation (LFO) and spindle wave, have been demonstrated in cat parietal cortex by optical imaging of intrinsic signals at wavelength of 540 nm. The LFO and spindle wave obtained from contralateral parietal areas are out of phase or anti phase for 62% of the time reckoned. In order to understand the temporal and inter-area parameters of this activity, we compared the oscillatory activity of these cortical areas using correlation analysis. The anti-phase activation are assumed to be the neural substrates of form and movement processing respectively, and is interpreted as reflection of reciprocal inhibition between hemispheres. The possible mechanism of the periodic interhemispheric asynchrony revealed by the LFO and spindle wave is discussed.

Keywordsnterhemispheric rivalry theory; hemispherioc asynchrony; neurology
ANZSRC Field of Research 2020320903. Central nervous system
310910. Animal physiology - systems
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Byline AffiliationsUniversity of Queensland
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