Functional hemispheric asynchrony: an optical imaging study

Liu, Guang Bin and Pettigrew, John (2002) Functional hemispheric asynchrony: an optical imaging study. In: 22nd Annual Meeting of the Australian Neuroscience Society (ANS 2002), March 2002, Sydney, Australia.

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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.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Poster)
Refereed: Yes
Item Status: Live Archive
Additional Information: Unable to source copy of publication.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 14 Dec 2017 03:58
Last Modified: 14 Dec 2017 03:58
Uncontrolled Keywords: nterhemispheric rivalry theory; hemispherioc asynchrony; neurology
Fields of Research : 11 Medical and Health Sciences > 1109 Neurosciences > 110903 Central Nervous System
06 Biological Sciences > 0606 Physiology > 060603 Animal Physiology - Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970111 Expanding Knowledge in the Medical and Health Sciences
URI: http://eprints.usq.edu.au/id/eprint/7623

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