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Related Experiment Video

Updated: May 30, 2026

An Appetitive Spatial Working Memory Task for Mice in a Semi-Automated 8-Arm Radial Maze, Reducing Fearful Memory Association in the Maze
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Cholinergic modulation of working memory activity in primate prefrontal cortex.

Xin Zhou1, Xue-Lian Qi, Kristy Douglas

  • 1Dept. of Neurobiology and Anatomy, Wake Forest Univ. School of Medicine, Medical Center Blvd., Winston Salem, NC 27157, USA.

Journal of Neurophysiology
|July 29, 2011
PubMed
Summary
This summary is machine-generated.

Acetylcholine

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuropharmacology

Background:

  • The prefrontal cortex (PFC) is crucial for working memory and higher cognitive functions.
  • Cholinergic neurotransmission modulates PFC activity, but its precise role is not fully understood.

Purpose of the Study:

  • To investigate the role of acetylcholine in primate prefrontal neuronal activity during working memory tasks.
  • To determine the effects of muscarinic receptor blockade on cognitive performance and neural correlates.

Main Methods:

  • Systemic administration of scopolamine, a muscarinic receptor antagonist.
  • Recording of primate prefrontal neuronal activity using chronic electrode arrays and single electrodes.
  • Assessment of behavioral performance in various working memory tasks.

Main Results:

  • Scopolamine administration caused a dose-dependent decrease in working memory task performance.
  • Behavioral deficits were not attributable to visual processing, eye movement, or attention impairments.
  • Performance degradation correlated with decreased neuronal firing rates and reduced spatial selectivity in the PFC during the delay period.

Conclusions:

  • Muscarinic receptor blockade impairs working memory performance in primates.
  • Cholinergic transmission is critical for prefrontal cortex activity underlying working memory.
  • These findings highlight the importance of the cholinergic system in cognitive functions mediated by the PFC.