Show Reference: "Flexible Categorization of Relative Stimulus Strength by the Optic Tectum"

Flexible Categorization of Relative Stimulus Strength by the Optic Tectum The Journal of Neuroscience, Vol. 31, No. 21. (25 May 2011), pp. 7745-7752, doi:10.1523/jneurosci.5425-10.2011 by Shreesh P. Mysore, Eric I. Knudsen
    abstract = {Categorization is the process by which the brain segregates continuously variable stimuli into discrete groups. We report that patterns of neural population activity in the owl optic tectum ({OT}) categorize stimuli based on their relative strengths into  ” strongest” versus  ” other.” The category boundary shifts adaptively to track changes in the absolute strength of the strongest stimulus. This population-wide categorization is mediated by the responses of a small subset of neurons. Our data constitute the first direct demonstration of explicit categorization of stimuli by a neural network based on relative stimulus strength or salience. The finding of categorization by the population code relaxes constraints on the properties of downstream decoders that might read out the location of the strongest stimulus. These results indicate that the ensemble neural code in the {OT} could mediate bottom-up stimulus selection for gaze and attention, a form of stimulus categorization in which the category boundary often shifts within hundreds of milliseconds.},
    author = {Mysore, Shreesh P. and Knudsen, Eric I.},
    day = {25},
    doi = {10.1523/jneurosci.5425-10.2011},
    journal = {The Journal of Neuroscience},
    month = may,
    number = {21},
    pages = {7745--7752},
    pmid = {21613487},
    posted-at = {2011-08-01 14:14:49},
    priority = {2},
    title = {Flexible Categorization of Relative Stimulus Strength by the Optic Tectum},
    url = {},
    volume = {31},
    year = {2011}

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