<div class="infobox infobox-cell-type"> <table> <tr><th>Cell Type</th><td>Substantia Nigra Pars Compacta (SNc) Dopaminergic Neurons</td></tr> [@kalia2015] <tr><th>Brain Region</th><td>Basal Ganglia - Midbrain</td></tr> [@surmeier2017] <tr><th>Primary Neurotransmitter</th><td>Dopamine</td></tr> [@kalia2019] <tr><th>Function</th><td>Motor control, reward learning, habit formation, movement timing</td></tr> <tr><th>Associated Diseases</th><td>Parkinson's Disease, Dementia with Lewy Bodies</td></tr> </table> </div>
Introduction
The Substantia Nigra Pars Compacta (SNc) contains dopamine-producing neurons that project to the striatum, forming the nigrostriatal pathway — the neural circuit whose degeneration is the hallmark of Parkinson's disease. These neurons are essential for motor initiation, movement timing, habit formation, and reward-based learning. The selective vulnerability and death of SNc dopaminergic neurons is one of the most studied phenomena in neurodegenerative neuroscience.
Overview
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Substantia Nigra Pars Compacta Neurons
<div class="infobox infobox-cell-type"> <table> <tr><th>Cell Type</th><td>Substantia Nigra Pars Compacta (SNc) Dopaminergic Neurons</td></tr> [@kalia2015] <tr><th>Brain Region</th><td>Basal Ganglia - Midbrain</td></tr> [@surmeier2017] <tr><th>Primary Neurotransmitter</th><td>Dopamine</td></tr> [@kalia2019] <tr><th>Function</th><td>Motor control, reward learning, habit formation, movement timing</td></tr> <tr><th>Associated Diseases</th><td>Parkinson's Disease, Dementia with Lewy Bodies</td></tr> </table> </div>
Introduction
The Substantia Nigra Pars Compacta (SNc) contains dopamine-producing neurons that project to the striatum, forming the nigrostriatal pathway — the neural circuit whose degeneration is the hallmark of Parkinson's disease. These neurons are essential for motor initiation, movement timing, habit formation, and reward-based learning. The selective vulnerability and death of SNc dopaminergic neurons is one of the most studied phenomena in neurodegenerative neuroscience.
Overview
Mermaid diagram (expand to render)
The substantia nigra is located in the midbrain and consists of two main parts:
Pars Compacta (SNc): Dense sheet of dopaminergic neurons, heavily pigmented due to neuromelanin
Pars Reticulata (SNr): GABAergic output neurons
The SNc contains approximately 400,000-600,000 dopaminergic neurons in humans, representing about 70% of the total dopaminergic neurons in the midbrain. These neurons are uniquely vulnerable due to several factors:
High Metabolic Demand: Extensive axonal arborization (~100,000 terminals per neuron)
[Alpha-Synuclein — Key protein in PD pathogenesis](/genes/th)
[PINK1 — Parkinson's gene](/genes/ar)
[PARKIN — Parkinson's gene](/genes/ar)
Background
The study of Substantia Nigra Pars Compacta Neurons has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
External Links
[PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
Alzheimer's Disease's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
[Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data
See Also
[Striatum in Procedural Memory](/wiki/cell-types-striatum-procedural-memory) — interacts_with