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Updated: Jul 12, 2026
08:49
Presynaptic Dopamine Dynamics in Striatal Brain Slices with Fast-scan Cyclic Voltammetry
Published on: January 12, 2012
Excitability of dopamine neurons: modulation and physiological consequences
M Marinelli1, C N Rudick, X-T Hu
1Department of Cellular & Molecular Pharmacology, Rosalind Franklin University of Medicine and Science/The Chicago Medical School, North Chicago, IL 60064, USA. micky.marinelli@rosalindfranklin.edu
CNS & Neurological Disorders Drug Targets
|April 15, 2006
Summary
Dopamine neurons in the midbrain (A9 and A10 pathways) exhibit varied firing patterns influenced by intrinsic, synaptic, and life experiences. Dysregulation of these dopamine pathways may contribute to psychiatric conditions like drug addiction.
Area of Science:
- Neuroscience
- Neurophysiology
Background:
- Midbrain dopamine neurons (A9 and A10 pathways) project to cortico-limbic and motor areas.
- These neurons display diverse electrophysiological properties, including silent, spontaneously active, and bursting firing modes.
Purpose of the Study:
- To review the literature on the excitability and function of midbrain dopamine neurons.
- To explore intrinsic, synaptic, and experiential factors modulating dopamine neuron activity.
Main Methods:
- Literature review of electrophysiological studies in rodents and non-human primates.
- Analysis of factors influencing dopamine neuron firing patterns.
Main Results:
- Dopamine neuron firing is modulated by somatodendritic autoreceptors, ion channel balance, and synaptic inputs.
- Neuronal activity is influenced by development, stress, drug exposure, and learning experiences.
Conclusions:
- Dopamine neuron excitability is dynamically regulated by multiple factors.
- Altered dopamine neuron physiology may underlie psychiatric disorders, including addiction.
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