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  Inhibitory Transfer of Thalamocortical Input in a Column of Rat Vibrissal Cortex

Udvary, D., Meyer, R.-S., Egger, R., Guest, J., Feldmeyer, D., & Oberlaender, M. (2015). Inhibitory Transfer of Thalamocortical Input in a Column of Rat Vibrissal Cortex. Poster presented at 16th Conference of Junior Neuroscientists of Tübingen (NeNa 2015): Communicating the Challenges of Science, Schramberg, Germany.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-E318-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-D3D7-D
Genre: Poster

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 Creators:
Udvary, D1, 2, Author              
Meyer, R-S, Author
Egger, R1, 2, Author              
Guest, JM, Author
Feldmeyer, D, Author
Oberlaender, M1, 2, Author              
Affiliations:
1Former Research Group Computational Neuroanatomy, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528698              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Thalamocortical (TC) afferents give rise to the elementary functional units of sensory cortex, cortical columns. Principles underlying spread of inhibition within a column remain, however, unknown. Here, we unravel how TC input may be relayed spatially by inhibitory interneurons (INs) by classifying axonal projection patterns of INs (N=204) located throughout layers (L) 2-6 in rat vibrissal cortex (vS1). We found five projection types independent of laminar location and postsynaptic target specificity. We integrated these into a dense average 3D model of rat vS1, thus allowing describing TC input to INs by structural overlap. This procedure provided first-order quantitative estimates of how TC input is relayed by INs within a column. We found three major TC->IN pathways that are largely decoupled from those of excitatory cell types: (i) focal inhibition to L4, (ii) blanket inhibition, and (iii) specific inhibition targeting cortical zones of highest IN soma density.

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 Dates: 2015-11
 Publication Status: Published in print
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Title: 16th Conference of Junior Neuroscientists of Tübingen (NeNa 2015): Communicating the Challenges of Science
Place of Event: Schramberg, Germany
Start-/End Date: 2015-11-23 - 2015-11-25

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Title: 16th Conference of Junior Neuroscientists of Tübingen (NeNa 2015): Communicating the Challenges of Science
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 61 Identifier: -