Dissecting the Diversity of Midbrain Dopamine Neurons

Trends Neurosci. 2013 Jun;36(6):336-42. doi: 10.1016/j.tins.2013.03.003. Epub 2013 Apr 12.

Abstract

Midbrain dopamine (DA) neurons are essential for controlling key functions of the brain, such as voluntary movement, reward processing, and working memory. The largest populations of midbrain DA neurons are localized in two neighboring nuclei, the substantia nigra (SN) and the ventral tegmental area (VTA). Regardless of their different axonal projections to subcortical and cortical targets, midbrain DA neurons have traditionally been regarded as a relatively homogeneous group of neurons, with a stereotypical set of intrinsic electrophysiological properties and in vivo pattern of activity. In this review, I highlight recent data supporting an unexpected degree of diversity among these midbrain DA neurons in the mammalian brain, ranging from their developmental lineages and different synaptic connectivity to their electrophysiological properties and behavioral functions.

Publication types

  • Review

MeSH terms

  • Action Potentials / physiology
  • Animals
  • Avoidance Learning / physiology
  • Cell Lineage
  • Cognition / physiology
  • Dopamine / physiology
  • Dopaminergic Neurons / classification*
  • Dopaminergic Neurons / physiology
  • Exploratory Behavior / physiology
  • Humans
  • Mesencephalon / cytology*
  • Motivation / physiology
  • Nerve Tissue Proteins / physiology
  • Neural Pathways / physiology
  • Optogenetics
  • Reward
  • Single-Cell Analysis
  • Substantia Nigra / cytology
  • Substantia Nigra / physiology
  • Ventral Tegmental Area / cytology
  • Ventral Tegmental Area / physiology

Substances

  • Nerve Tissue Proteins
  • Dopamine