Cholinergic modulation of working memory activity in primate prefrontal cortex

Xin Zhou, Xue Lian Qi, Kristy Douglas, Kathini Palaninathan, Hyun Sug Kang, Jerry J. Buccafusco, David Trumbull Blake, Christos Constantinidis

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

The prefrontal cortex, a cortical area essential for working memory and higher cognitive functions, is modulated by a number of neurotransmitter systems, including acetylcholine; however, the impact of cholinergic transmission on prefrontal activity is not well understood. We relied on systemic administration of a muscarinic receptor antagonist, scopolamine, to investigate the role of acetylcholine on primate prefrontal neuronal activity during execution of working memory tasks and recorded neuronal activity with chronic electrode arrays and single electrodes. Our results indicated a dose-dependent decrease in behavioral performance after scopolamine administration in all the working memory tasks we tested. The effect could not be accounted for by deficits in visual processing, eye movement responses, or attention, because the animals performed a visually guided saccade task virtually error free, and errors to distracting stimuli were not increased. Performance degradation under scopolamine was accompanied by decreased firing rate of the same cortical sites during the delay period of the task and decreased selectivity for the spatial location of the stimuli. These results demonstrate that muscarinic blockade impairs performance in working memory tasks and prefrontal activity mediating working memory.

Original languageEnglish (US)
Pages (from-to)2180-2188
Number of pages9
JournalJournal of Neurophysiology
Volume106
Issue number5
DOIs
StatePublished - Nov 2011

Keywords

  • Monkey
  • Neuron
  • Persistent activity
  • Principal sulcus
  • Scopolamine

ASJC Scopus subject areas

  • Neuroscience(all)
  • Physiology

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    Zhou, X., Qi, X. L., Douglas, K., Palaninathan, K., Kang, H. S., Buccafusco, J. J., Blake, D. T., & Constantinidis, C. (2011). Cholinergic modulation of working memory activity in primate prefrontal cortex. Journal of Neurophysiology, 106(5), 2180-2188. https://doi.org/10.1152/jn.00148.2011