Coupling between One-Dimensional Networks Reconciles Conflicting Dynamics in LIP and Reveals Its Recurrent Circuitry

Wujie Zhang, Annegret L. Falkner, B. Suresh Krishna, Michael E. Goldberg, Kenneth D. Miller

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Little is known about the internal circuitry of the primate lateral intraparietal area (LIP). During two versions of a delayed-saccade task, we found radically different network dynamics beneath similar population average firing patterns. When neurons are not influenced by stimuli outside their receptive fields (RFs), dynamics of the high-dimensional LIP network during slowly varying activity lie predominantly in one multi-neuronal dimension, as described previously. However, when activity is suppressed by stimuli outside the RF, slow LIP dynamics markedly deviate from a single dimension. The conflicting results can be reconciled if two LIP local networks, each underlying an RF location and dominated by a single multi-neuronal activity pattern, are suppressively coupled to each other. These results demonstrate the low dimensionality of slow LIP local dynamics, and suggest that LIP local networks encoding the attentional and movement priority of competing visual locations actively suppress one another.

Original languageEnglish (US)
Pages (from-to)221-234
Number of pages14
JournalNeuron
Volume93
Issue number1
DOIs
StatePublished - Jan 4 2017

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

Keywords

  • LIP
  • attention
  • model
  • network dynamics
  • surround suppression

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