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Sean Austin O Lim1, Un Jung Kang2, Daniel S McGehee3

  • 1Committee on Neurobiology, University of Chicago Chicago, IL, USA.

Frontiers in Synaptic Neuroscience
|November 7, 2014
PubMed
Summary

Acetylcholine (ACh) is crucial for striatal function in motor control and learning. This review explores how cholinergic interneurons (ChIs) influence striatal circuits and their role in disease.

Keywords:
Parkinson's diseaseacetylcholinecholinergic interneuronplasticitystriatum

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Area of Science:

  • Neuroscience
  • Cellular Biology

Background:

  • The striatum is vital for motor control, learning, and integrating sensory, motor, and motivational information.
  • Acetylcholine (ACh) is a key neurotransmitter in the striatum, with high levels of ACh and its receptors.
  • Cholinergic interneurons (ChIs) are the primary source of striatal ACh, despite comprising only 1-2% of striatal cells.

Purpose of the Study:

  • To review recent advances in understanding the factors influencing cholinergic interneuron (ChI) excitability.
  • To discuss the physiological effects of ACh within the striatum.
  • To explore the contribution of altered ACh levels to striatal dysfunction and disease.

Main Methods:

  • Review of recent scientific literature on striatal cholinergic systems.
  • Analysis of factors affecting cholinergic interneuron (ChI) excitability.
  • Discussion of the physiological roles and disease implications of striatal ACh.

Main Results:

  • Cholinergic interneurons (ChIs) significantly impact striatal circuit function through dense projections.
  • Synaptic inputs acutely and chronically modulate ChI excitability.
  • ACh exerts critical postsynaptic effects via nicotinic and muscarinic receptors.

Conclusions:

  • Understanding ChI function and ACh signaling is essential for comprehending striatal circuitry.
  • Dysregulation of ACh levels in the striatum is implicated in various neurological and psychiatric disorders.
  • Further research into striatal cholinergic mechanisms may reveal therapeutic targets for diseases involving striatal dysfunction.