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Foci of orientation plasticity in visual cortex

Author

Listed:
  • Valentin Dragoi

    (Massachusetts Institute of Technology)

  • Casto Rivadulla

    (Massachusetts Institute of Technology
    Neuroscience and Motor Control Group (NEUROcom))

  • Mriganka Sur

    (Massachusetts Institute of Technology)

Abstract

Cortical areas are generally assumed to be uniform in their capacity for adaptive changes or plasticity1,2,3,4. Here we demonstrate, however, that neurons in the cat striate cortex (V1) show pronounced adaptation-induced short-term plasticity of orientation tuning primarily at specific foci. V1 neurons are clustered according to their orientation preference in iso-orientation domains5 that converge at singularities or pinwheel centres6,7. Although neurons in pinwheel centres have similar orientation tuning and responses to those in iso-orientation domains, we find that they differ markedly in their capacity for adaptive changes. Adaptation with an oriented drifting grating stimulus alters responses of neurons located at and near pinwheel centres to a broad range of orientations, causing repulsive shifts in orientation preference and changes in response magnitude. In contrast, neurons located in iso-orientation domains show minimal changes in their tuning properties after adaptation. The anisotropy of adaptation-induced orientation plasticity is probably mediated by inhomogeneities in local intracortical interactions that are overlaid on the map of orientation preference in V1.

Suggested Citation

  • Valentin Dragoi & Casto Rivadulla & Mriganka Sur, 2001. "Foci of orientation plasticity in visual cortex," Nature, Nature, vol. 411(6833), pages 80-86, May.
    • Handle: RePEc:nat:nature:v:411:y:2001:i:6833:d:10.1038_35075070
    DOI: 10.1038/35075070
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    Cited by:

    1. Sunny Nigam & Russell Milton & Sorin Pojoga & Valentin Dragoi, 2023. "Adaptive coding across visual features during free-viewing and fixation conditions," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    2. Jeyadarshan Jeyabalaratnam & Vishal Bharmauria & Lyes Bachatene & Sarah Cattan & Annie Angers & Stéphane Molotchnikoff, 2013. "Adaptation Shifts Preferred Orientation of Tuning Curve in the Mouse Visual Cortex," PLOS ONE, Public Library of Science, vol. 8(5), pages 1-8, May.
    3. Narcis Ghisovan & Abdellatif Nemri & Svetlana Shumikhina & Stephane Molotchnikoff, 2008. "Visual Cells Remember Earlier Applied Target: Plasticity of Orientation Selectivity," PLOS ONE, Public Library of Science, vol. 3(11), pages 1-10, November.

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