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  • 31
    Jul 2018

    Adaptive coding in the human brain: Distinct object features are encoded by overlapping voxels in frontoparietal cortex


    Miller Lab
    Neuroscience

    More evidence for mixed-selectivity in the cortex.  This time with voxels in the human brain.

    Jackson, J., & Woolgar, A. (2018). Adaptive coding in the human brain: Distinct object features are encoded by overlapping voxels in frontoparietal cortex. Cortex.

    Read more about mixed selectivity:
    Rigotti, M., Barak, O., Warden, M.R., Wang, X., Daw, N.D., Miller, E.K., & Fusi, S. (2013) The importance of mixed selectivity in complex cognitive tasks. Nature, 497, 585-590, doi:10.1038/nature12160. View PDF »

    Fusi, S., Miller, E.K., and Rigotti, M. (2016) Why neurons mix: High dimensionality for higher cognition.  Current Opinion in Neurobiology. 37:66-74  doi:10.1016/j.conb.2016.01.010. View PDF »

  • 3
    Jul 2018

    Coordinated prefrontal–hippocampal activity and navigation strategy-related prefrontal firing during spatial memory formation


    Miller Lab
    Neuroscience

    Enhanced prefrontal-hippocampal spike-LFP coupling during learning of a spatial strategy (but not other strategies).

    Negrón-Oyarzo, I., Espinosa, N., Aguilar, M., Fuenzalida, M., Aboitiz, F., & Fuentealba, P. (2018). Coordinated prefrontal–hippocampal activity and navigation strategy-related prefrontal firing during spatial memory formation. Proceedings of the National Academy of Sciences, 201720117.

  • 20
    Jun 2018

    Visual and Category Representations Shaped by the Interaction Between Inferior Temporal and Prefrontal Cortices


    Miller Lab
    Neuroscience

    A computational model of visual categorization in cortex that has properties similar to our lab’s results.  It must be true.

    Abe, Y., Fujita, K., & Kashimori, Y. (2018). Visual and Category Representations Shaped by the Interaction Between Inferior Temporal and Prefrontal Cortices. Cognitive Computation, 1-16.

  • 20
    Jun 2018

    Feature-Based Visual Short-Term Memory Is Widely Distributed and Hierarchically Organized


    Miller Lab
    Neuroscience

    Big-ass survey of cortex by Gray and crew:

    Dotson, N. M., Hoffman, S. J., Goodell, B., & Gray, C. M. (2018). Feature-Based Visual Short-Term Memory Is Widely Distributed and Hierarchically Organized. Neuron.

  • 10
    May 2018

    Top-down beta oscillatory signaling conveys behavioral context in early visual cortex


    Miller Lab
    Neuroscience

    Nice paper by Bressler and colleagues showing that top-down influences on visual cortex are mediated by beta-band oscillations.

    Richter, C. G., Coppola, R., & Bressler, S. L. (2018). Top-down beta oscillatory signaling conveys behavioral context in early visual cortex. Scientific reports, 8(1), 6991.

    Further reading on beta oscillations mediating top-down processing:
    Buschman, T.J. and Miller, E.K. (2007) Top-down versus bottom-up control of attention in the prefrontal and posterior parietal cortices. Science. 315: 1860-1862  View PDF »

    Bastos, A.M., Loonis, R., Kornblith, S., Lundqvist, M., and Miller, E.K. (2018)  Laminar recordings in frontal cortex suggest distinct layers for maintenance and control of working memory.  Proceedings of the National Academy of Sciences.  View PDF

     

  • 10
    May 2018

    Error-correcting dynamics in visual working memory


    Miller Lab
    Neuroscience

    Nice result from Buschman Lab.  Error-correcting dynamics introduce bias into working memory while reducing noise.

    Error-correcting dynamics in visual working memory
    Matthew F Panichello, Brian DePasquale, Jonathan W Pillow, Timothy Buschman
    doi: https://doi.org/10.1101/319103

  • 5
    Apr 2018

    A heavy working memory load may sink brainwave ‘synch’


    Miller Lab
    Miller Laboratory, Neuroscience

    Press release for our new paper:
    A heavy working memory load may sink brainwave ‘synch’

    The paper:
    Pinotsis, D.A., Buschman, T.J. and Miller, E.K. (2018) Working Memory Load Modulates Neuronal Coupling. Cerebral Cortex.  https://doi.org/10.1093/cercor/bhy065  View PDF

  • 30
    Mar 2018

    New Paper: Working Memory Load Modulates Neuronal Coupling


    Miller Lab
    Miller Laboratory, Neuroscience

    Pinotsis, D.A., Buschman, T.J. and Miller, E.K. (2018) Working Memory Load Modulates Neuronal Coupling. Cerebral Cortex, 2018 https://doi.org/10.1093/cercor/bhy065

    Abstract: There is a severe limitation in the number of items that can be held in working memory. However, the neurophysiological limits remain unknown. We asked whether the capacity limit might be explained by differences in neuronal coupling. We developed a theoretical model based on Predictive Coding and used it to analyze Cross Spectral Density data from the prefrontal cortex (PFC), frontal eye fields (FEF), and lateral intraparietal area (LIP). Monkeys performed a change detection task. The number of objects that had to be remembered (memory load) was varied (1–3 objects in the same visual hemifield). Changes in memory load changed the connectivity in the PFC–FEF–LIP network. Feedback (top-down) coupling broke down when the number of objects exceeded cognitive capacity. Thus, impaired behavioral performance coincided with a break-down of Prediction signals. This provides new insights into the neuronal underpinnings of cognitive capacity and how coupling in a distributed working memory network is affected by memory load.

  • 27
    Mar 2018

    An Integrative Framework for Sensory, Motor, and Cognitive Functions of the Posterior Parietal Cortex


    Miller Lab
    Neuroscience

    Freedman and Ibos give us a new general framework to think about the functions of the parietal cortex.

    Freedman, D. J., & Ibos, G. (2018). An Integrative Framework for Sensory, Motor, and Cognitive Functions of the Posterior Parietal Cortex. Neuron, 97(6), 1219-1234.

  • 27
    Mar 2018

    Crows Rival Monkeys in Cognitive Capacity


    Miller Lab
    Neuroscience

    Miller Lab alumnus Jonas Rose compares cognitive capacity across species.  Note that cognitive capacity correlates with intelligence but it is not the same thing.

    Balakhonov, D., & Rose, J. (2017). Crows Rival Monkeys in Cognitive Capacity. Scientific reports, 7(1), 8809.

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