Spreading and synchronization of intrinsic signals in visual cortex of macaque monkey evoked by a localized visual stimulus

Liu, Guang B. and Zhang, Ying and Pettigrew, John D. and Xu, Wei F. and Li, Chao-Yi (2003) Spreading and synchronization of intrinsic signals in visual cortex of macaque monkey evoked by a localized visual stimulus. Brain Research, 985 (1). pp. 13-20. ISSN 0006-8993


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[Abstract]: Spatio-temporal maps of the occipital cortex of macaque monkeys were analyzed using optical imaging of intrinsic signals. The images obtained during localized visual stimulation (IS) were compared with the images obtained on presentation of a blank screen (IB).We first investigated spontaneous variations of the intrinsic signals by analyzing the 100 IBs for each of the three cortical areas. Slow periodical activation was observed in alternation over the cortical areas. Cross-correlation analysis indicated that synchronization of spontaneous
activation only took place within each cortical area, but not between them. When a small, drifting grating (28328) was presented on the fovea, a dark spot appeared in the optical image at the cortical representation of this retinal location. It spread bilaterally along the border
between V1 and V2, continuing as a number of parallel dark bands covering a large area of the lateral surface of V1. Cross-correlation analysis showed that during visual stimulation the intrinsic signals over all of the three cortical areas were synchronized, with in-phase
activation of V1 and V2 and anti-phase activation of V4 and V1/V2. The significance of these extensive synergistic and antagonistic interactions between different cortical areas is discussed.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author's version unavailable in electronic format.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 01:22
Last Modified: 02 Jul 2013 22:50
Uncontrolled Keywords: optical imaging, visual cortex, macaque monkey
Fields of Research : 06 Biological Sciences > 0606 Physiology > 060603 Animal Physiology - Systems
11 Medical and Health Sciences > 1109 Neurosciences > 110903 Central Nervous System
11 Medical and Health Sciences > 1109 Neurosciences > 110906 Sensory Systems
Identification Number or DOI: 10.1016/S00006-8993(03)03049-X
URI: http://eprints.usq.edu.au/id/eprint/3224

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