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Cortical Modulation of the Transient Visual Response at Thalamic Level: A TMS Study

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  • Nelson Espinosa
  • Jorge Mariño
  • Carmen de Labra
  • Javier Cudeiro

Abstract

The transient visual response of feline dorsal lateral geniculate nucleus (dLGN) cells was studied under control conditions and during the application of repetitive transcranial magnetic stimulation at 1 Hz (rTMS@1Hz) on the primary visual cortex (V1). The results show that rTMS@1Hz modulates the firing mode of Y cells, inducing an increase in burst spikes and a decrease in tonic firing. On the other hand, rTMS@1Hz modifies the spatiotemporal characteristics of receptive fields of X cells, inducing a delay and a decrease of the peak response, and a change of the surround/center amplitude ratio of RF profiles. These results indicate that V1 controls the activity of the visual thalamus in a different way in the X and Y pathways, and that this feedback control is consistent with functional roles associated with each cell type.

Suggested Citation

  • Nelson Espinosa & Jorge Mariño & Carmen de Labra & Javier Cudeiro, 2011. "Cortical Modulation of the Transient Visual Response at Thalamic Level: A TMS Study," PLOS ONE, Public Library of Science, vol. 6(2), pages 1-11, February.
    • Handle: RePEc:plo:pone00:0017041
    DOI: 10.1371/journal.pone.0017041
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    References listed on IDEAS

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    1. Mark Hallett, 2000. "Transcranial magnetic stimulation and the human brain," Nature, Nature, vol. 406(6792), pages 147-150, July.
    2. Nicholas A Lesica & Chong Weng & Jianzhong Jin & Chun-I Yeh & Jose-Manuel Alonso & Garrett B Stanley, 2006. "Dynamic Encoding of Natural Luminance Sequences by LGN Bursts," PLOS Biology, Public Library of Science, vol. 4(7), pages 1-1, June.
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