Abstract
Thalamic function does not stand apart, as a discrete processing step, from the cortical circuitry. The thalamus receives extensive feedback from the cortex and this influences the firing pattern, synchronization and sensory response mode of relay cells. A crucial question concerns the extent to which the feedback simply controls the state and transmission mode of relay cells and the extent to which the feedback participates in the specific processing of sensory information. Using examples from experiments examining the influence of feedback from the visual cortex to the lateral geniculate nucleus (LGN), we argue that thalamic mechanisms are selectively focused by visually driven feedback to optimize the thalamic contribution to segmentation and global integration. This involves effects on both the temporal and spatial parameters characterizing the responses of LGN cells and includes, for example, motion–driven feedback effects from MT (middle temporal visual area) relayed via layer 6 of V1 (primary visual cortex).
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Dates
Type | When |
---|---|
Created | 22 years, 5 months ago (March 7, 2003, 11:01 p.m.) |
Deposited | 4 years, 6 months ago (Feb. 20, 2021, 1:58 p.m.) |
Indexed | 1 month, 1 week ago (July 23, 2025, 8:18 a.m.) |
Issued | 22 years, 8 months ago (Dec. 29, 2002) |
Published | 22 years, 8 months ago (Dec. 29, 2002) |
Published Online | 22 years, 8 months ago (Dec. 29, 2002) |
Published Print | 22 years, 8 months ago (Dec. 29, 2002) |
@article{Sillito_2002, title={Corticothalamic interactions in the transfer of visual information}, volume={357}, ISSN={1471-2970}, url={http://dx.doi.org/10.1098/rstb.2002.1170}, DOI={10.1098/rstb.2002.1170}, number={1428}, journal={Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences}, publisher={The Royal Society}, author={Sillito, Adam M. and Jones, Helen E.}, editor={Adams, P. and Guillery, R. W. and Sherman, S. M. and Sillito, A. M.}, year={2002}, month=dec, pages={1739–1752} }