کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4323096 1291751 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Context-Dependent Changes in Functional Circuitry in Visual Area MT
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب سلولی و مولکولی
پیش نمایش صفحه اول مقاله
Context-Dependent Changes in Functional Circuitry in Visual Area MT
چکیده انگلیسی

SummaryAnimals can flexibly change their behavior in response to a particular sensory stimulus; the mapping between sensory and motor representations in the brain must therefore be flexible as well. Changes in the correlated firing of pairs of neurons may provide a metric of changes in functional circuitry during behavior. We studied dynamic changes in functional circuitry by analyzing the noise correlations of simultaneously recorded MT neurons in two behavioral contexts: one that promotes cooperative interactions between the two neurons and another that promotes competitive interactions. We found that identical visual stimuli give rise to differences in noise correlation in the two contexts, suggesting that MT neurons receive inputs of central origin whose strength changes with the task structure. The data are consistent with a mixed feature-based attentional strategy model in which the animal sometimes alternates attention between opposite directions of motion and sometimes attends to the two directions simultaneously.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 60, Issue 1, 9 October 2008, Pages 162–173
نویسندگان
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