D1 and D2 Dopamine Receptor Modulation of Glutamatergic Signaling in Striatal Medium Spiny Neurons

Research output: Chapter in Book/Report/Conference proceedingChapter

8 Scopus citations

Abstract

This chapter explores that dopamine (DA) has long been known to be a critical modulator of striatal processing of cortical and thalamic signals carried by glutamatergic synapses on the principal neurons of the striatum – medium spiny neurons (MSNs). DA regulation of these neurons is important for a wide array of psychomotor functions ascribed to the basal ganglia such as habit learning and the control of serial movement. In spite of its significance, an understanding of the physiological principles underlying MSN regulation has developed slowly. It reviews that major obstacle to unraveling the DA puzzle in the striatum has been the lack of homogeneity in the MSN class; there are at least two major subsets of MSNs that differ in their expression of DA receptors. These subsets cannot be readily identified on the basis of their somato­dendritic morphology or electrophysiological properties. Both cell types are imbedded in a rich neuronal network involving both MSNs and interneurons that is modulated by DA. DA receptors are primarily found in dendrites that are inaccessible with electrodes, making direct study of their actions on glutamatergic signaling and dendritic excitability difficult. argely focuses on what is known about how DA modulates postsynaptic properties that influence glutamatergic synaptic events and their integration by MSNs in the dorsal striatum. Only the actions of the principal DA receptors in this region (D1, D2 receptors) are discussed.

Original languageEnglish (US)
Title of host publicationHandbook of Behavioral Neuroscience
Pages113-132
Number of pages20
EditionC
DOIs
StatePublished - Jan 1 2010

Publication series

NameHandbook of Behavioral Neuroscience
NumberC
Volume20
ISSN (Print)1569-7339

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Behavioral Neuroscience

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