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  Thalamo-cortical connections and their correlation with receptive field properties in the cat's lateral suprasylvian visual cortex

Rauschecker, J., von Grünau, M., & Poulin, C. (1987). Thalamo-cortical connections and their correlation with receptive field properties in the cat's lateral suprasylvian visual cortex. Experimental Brain Research, 67(1), 100-112. doi:10.1007/BF00269458.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-0F32-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-9429-5
Genre: Journal Article

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Rauschecker, JP1, 2, Author              
von Grünau, MW, Author              
Poulin, C, Author              
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1Former Department Structure and Function of Natural Nerve-Net , Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497803              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Areas PMLS and PLLS of the cat's lateral suprasylvian visual cortex display an interesting global organization of local features in their single unit response properties: direction preference is centrifugally organized and velocity preference increases with eccentricity. In addition it has previously been shown that binocular interactions are strongest around the visual field center. This characterizes the LS areas as apt for the analysis of optic flow fields and for visual processing in various kinds of visuomotor tasks (Rauschecker et al. 1987). In the present study we analysed the types of input to LS from the optic chiasm, the corpus callosum and from two thalamic relay nuclei (lateral posterior and lateral geniculate) that constitute important sources of afferent information to the LS areas. We were interested in learning how the afferent (and efferent) connections between LS and these structures relate to the response properties of LS neurons. Overlap of an RF into the ipsilateral hemifield was virtually always associated with callosal input. Latency differences between responses to electrical stimulation of the optic chiasm and the thalamic sites indicated almost exclusively fast-conducting Y-input to LS. Correlation of response latencies with receptive field properties revealed the following correspondences: A positive correlation was found between LP-latency and RF-size matching the dependence of RF size on laminar origin. The type of correlation found between LP-latency and directional tuning of LS cells suggests that an interaction between thalamic and other inputs may be responsible for direction selectivity in LS. Finally, correlation of LP-latencies with centrifugal direction preference suggests that this specific property is generated by intracortical wiring rather than by thalamic input.

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 Dates: 1987-06
 Publication Status: Published in print
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 Identifiers: DOI: 10.1007/BF00269458
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Title: Experimental Brain Research
  Other : Exp. Brain Res.
Source Genre: Journal
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Publ. Info: Heidelberg : Springer-Verlag
Pages: - Volume / Issue: 67 (1) Sequence Number: - Start / End Page: 100 - 112 Identifier: ISSN: 0014-4819
CoNE: https://pure.mpg.de/cone/journals/resource/954925398496