Spatiotemporal Patterns of Light Stimulation are Correlated with Large Scale Dynamical Patterns of Synchronised Oscillations
Although there have been many reports of fast frequency (10–50 Hz) oscillations in the vertebrate visual system, much debate persists about their functional significance to visual processing.1,2,3,4,5 In previous reports, we have demonstrated the existence of widespread oscillatory discharges throughout multiple retinorecipient nuclei in the subcortical visual system of the anaesthetised and awake rat.6 The results of our studies indicate these oscillations may play a role in a form of dynamic-distributed processing of visual information which has yet to be described in the lower levels of the visual system. In this paper, we suggest the visual system may incorporate two modes when making representations of visual attributes. The local feature mode is linked to the theory of circumscribed receptive fields associated with individual neurons.1 The global feature mode makes use of a periodic oscillatory signal emerging from a network distributed across the retina.
KeywordsReceptive Field Stimulus Frequency Light Stimulation Oscillatory Response Spontaneous Oscillation
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- 1.Eckhorn R., Bauer R., Jordan W., Brosch M., Kruse W., Munk M., Reitboeck H.J. Coherent Oscillations: A Mechanism of Feature Linking in Visual Cortex? Bio/ Ct bern (1988) 60: 121–130.Google Scholar
- 2.Gray C.M., Konig P., Engel A.K., Singer W. Oscillatory Responses in Cat Visual Cortex Exhibit Inter-columnar Synchronization Which Reflects Global Stimulus Properties. Nature (1989) 338: 334–337.Google Scholar
- 3.Hashemiyoon. R. Synchronous Oscillations in the Subcortical Visual System. Thesis (1996).Google Scholar
- 4.Ghose G.M., Freeman R.D. Oscillatory Discharge in the Visual System: Does it Have a Functional Role? J Neurophvs (1992) 68: 1558–1574.Google Scholar
- 5.Bullock T.H., Hofmann M.H., Nahm F.K., New J.G., Prechtl J.C. Event-Related Potentials in the Retina and Optic Tectum in Fish. J Neurophys (1990) 64: 903–914.Google Scholar
- 6.Hashemiyoon, R. and Chapin, J. Retinally Derived Fast Oscillations Coding for Global Stimulus Properties Synchronise Multiple Visual System Structures. Soc. Neurosci. Ah.st,: (1993) 19: 528.Google Scholar
- 7.Hubei, D.W, Wiesel, T.N. Receptive Fields, Binocular Interaction, and Functional Architecture in the Cat’s Visual Cortex. J Phvsiol (1962) 160: 106–154.Google Scholar
- 8.Gray C.M., Engel A.K., Konig P., Singer W. Stimulus-Dependent Neuronal Oscillations in Cat Visual Cortex: Receptive Field Properties and Feature Dependence. Eur J Neurosci (1990) 2: 607–619.Google Scholar
- 9.Hashemiyoon, R. and Chapin, J. Computational Neuroscience: Trends in Research James M. Bower, ed. N.Y., N.Y.: Academic Press Inc., 1996.Google Scholar
- 10.Hashemiyoon, R.. and Chapin, J. Spatiotemporal Patterns of Visual Stimuli Modify Subcortical Visual System Oscillations. Assoc. Res. Vis. and Ophthal. Abst (1996) 37: 1059.Google Scholar