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  Cortical oscillations and the origin of express saccades.

Kirschfeld, K., Feiler, R., & Wolf-Oberhollenzer, F. (1996). Cortical oscillations and the origin of express saccades. Proceedings of the Royal Society of London B, 263(1369), 459-468. doi:10.1098/rspb.1996.0069.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-EB86-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-EB87-1
Genre: Journal Article

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Kirschfeld, K1, Author              
Feiler, R2, Author              
Wolf-Oberhollenzer, F2, Author              
Affiliations:
1Former Department Comparative Neurobiology, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497800              
2Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              

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 Abstract: The latencies of visually guided saccadic eye movements can form bimodal distributions. The 'express saccades' associated with the first mode of the distribution are thought to be generated via an anatomical pathway different from that for the second mode, which comprises regular saccades. The following previously published observations are the basis for a new alternative model of these effects: (i) visual stimuli can cause oscillations to appear in the electroencephalogram; (ii) visual stimuli can cause a negative shift in the electroencephalogram that lasts for several hundreds of milliseconds; and (iii) negativity in the electroencephalogram can be associated with reduced thresholds of cortical neurons to stimuli. In the new model both express and regular saccades are generated by the same anatomical structures. The differences in saccadic latency are produced by an oscillatory reduction of a threshold in the saccade-generating pathway that is transiently produced under certain stimulus paradigms. The model has implications regarding the functional significance of spontaneous and stimulus-induced oscillations in the central nervous system.

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 Dates: 1996-04
 Publication Status: Published in print
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Title: Proceedings of the Royal Society of London B
Source Genre: Journal
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Pages: - Volume / Issue: 263 (1369) Sequence Number: - Start / End Page: 459 - 468 Identifier: -