Journal
CURRENT OPINION IN NEUROBIOLOGY
Volume 37, Issue -, Pages 66-74Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.conb.2016.01.010
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Neurons often respond to diverse combinations of task relevant variables. This form of mixed selectivity plays an important computational role which is related to the dimensionality of the neural representations: high-dimensional representations with mixed selectivity allow a simple linear readout to generate a huge number of different potential responses. In contrast, neural representations based on highly specialized neurons are low dimensional and they preclude a linear readout from generating several responses that depend on multiple task-relevant variables. Here we review the conceptual and theoretical framework that explains the importance of mixed selectivity and the experimental evidence that recorded neural representations are high-dimensional. We end by discussing the implications for the design of future experiments.
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