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One-dimensional dynamics of attention and decision making in LIP.


ABSTRACT: Where we allocate our visual spatial attention depends upon a continual competition between internally generated goals and external distractions. Recently it was shown that single neurons in the macaque lateral intraparietal area (LIP) can predict the amount of time a distractor can shift the locus of spatial attention away from a goal. We propose that this remarkable dynamical correspondence between single neurons and attention can be explained by a network model in which generically high-dimensional firing-rate vectors rapidly decay to a single mode. We find direct experimental evidence for this model, not only in the original attentional task, but also in a very different task involving perceptual decision making. These results confirm a theoretical prediction that slowly varying activity patterns are proportional to spontaneous activity, pose constraints on models of persistent activity, and suggest a network mechanism for the emergence of robust behavioral timing from heterogeneous neuronal populations.

SUBMITTER: Ganguli S 

PROVIDER: S-EPMC7204626 | biostudies-literature | 2008 Apr

REPOSITORIES: biostudies-literature

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One-dimensional dynamics of attention and decision making in LIP.

Ganguli Surya S   Bisley James W JW   Roitman Jamie D JD   Shadlen Michael N MN   Goldberg Michael E ME   Miller Kenneth D KD  

Neuron 20080401 1


Where we allocate our visual spatial attention depends upon a continual competition between internally generated goals and external distractions. Recently it was shown that single neurons in the macaque lateral intraparietal area (LIP) can predict the amount of time a distractor can shift the locus of spatial attention away from a goal. We propose that this remarkable dynamical correspondence between single neurons and attention can be explained by a network model in which generically high-dimen  ...[more]

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