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Development and evolution of the subpallium.
Nerea Moreno1, Agustín González, Sylvie Rétaux
1Dpt. of Cell Biology, Faculty of Biology, University Complutense of Madrid, Av. Jose Antonio Novais, 2, 28040 Madrid, Spain. nerea@bio.ucm.es
Seminars in Cell & Developmental Biology
|April 21, 2009
Summary
The subpallium, a ventral telencephalon region in vertebrates, shares conserved developmental and functional traits. Despite evolutionary variations, it remains crucial for forebrain complexity and novel structures.
Area of Science:
- Neuroscience
- Developmental Biology
- Evolutionary Biology
Background:
- The subpallium, a ventral telencephalon region in vertebrates, exhibits conserved features across species.
- It is genetically specified by Dlx gene expression and gives rise to diverse neuronal cell types.
- The subpallium is fundamental for complex neuronal migration and forms conserved structures like basal ganglia and amygdala.
Purpose of the Study:
- To explore the commonalities and variations in subpallium development across vertebrates.
- To understand the role of the subpallium in the evolution of the vertebrate forebrain.
Main Methods:
- Comparative developmental studies.
- Analysis of gene expression patterns (Dlx genes).
- Tracing neuronal migration pathways during embryogenesis.
Main Results:
- A common basic plan for subpallium generation exists in vertebrates, involving similar progenitor domains and cell movements.
- The subpallium contributes a wide array of neuronal types to the telencephalon.
- Evolutionary modifications in the subpallium have likely driven diversification in vertebrate forebrain anatomy and function.
Conclusions:
- The subpallium is a highly conserved structure with a fundamental role in vertebrate brain development.
- Evolutionary changes within the subpallium have been a significant source of novelty in vertebrate forebrain evolution.
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