Multiplicative and Additive Modulation of Neuronal Tuning with Population Activity Affects Encoded Information

Iñigo Arandia-Romero, Seiji Tanabe, Jan Drugowitsch, Adam Kohn, Rubén Moreno-Bote

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Numerous studies have shown that neuronal responses are modulated by stimulus properties and also by the state of the local network. However, little is known about how activity fluctuations of neuronal populations modulate the sensory tuning of cells and affect their encoded information. We found that fluctuations in ongoing and stimulus-evoked population activity in primate visual cortex modulate the tuning of neurons in a multiplicative and additive manner. While distributed on a continuum, neurons with stronger multiplicative effects tended to have less additive modulation and vice versa. The information encoded by multiplicatively modulated neurons increased with greater population activity, while that of additively modulated neurons decreased. These effects offset each other so that population activity had little effect on total information. Our results thus suggest that intrinsic activity fluctuations may act as a "traffic light" that determines which subset of neurons is most informative.

Original languageEnglish (US)
Pages (from-to)1305-1316
Number of pages12
JournalNeuron
Volume89
Issue number6
DOIs
StatePublished - Mar 16 2016

ASJC Scopus subject areas

  • Neuroscience(all)

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