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Cortical interneurons and their origins.

Carl Wonders1, Stewart A Anderson

  • 1Program in Neuroscience, Weill Medical College of Cornell University, New York, New York 10021, USA.

The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry
|May 25, 2005
PubMed
Summary

Cortical interneurons, crucial for brain function, originate from the subcortical telencephalon. Their diverse origins contribute to the variety of interneuron types found in the brain.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • GABAergic interneurons are vital for cerebral cortex development and function.
  • Most cortical interneurons in nonprimate mammals originate from the subcortical telencephalon.
  • The medial ganglionic eminence is a primary source, but other origins are proposed.

Purpose of the Study:

  • To explore the diverse origins of GABAergic interneurons in the cerebral cortex.
  • To understand how interneuron origins influence their differentiated fates.
  • To synthesize evidence regarding proposed interneuron sources.

Main Methods:

  • Review of existing literature on cortical interneuron development.
  • Analysis of studies investigating cell origins in the telencephalon.
  • Integration of evidence from various proposed interneuron sources.

Main Results:

  • Cortical interneurons predominantly originate from the subcortical telencephalon.
  • Multiple subcortical regions, including medial, caudal, and lateral ganglionic eminences, and the septal region, are implicated as sources.
  • Evidence suggests the cortex itself may also contribute to interneuron populations.
  • Spatial diversity in origins correlates with the diversity of interneuron fates.

Conclusions:

  • The subcortical telencephalon is the primary source of cortical GABAergic interneurons.
  • A complex interplay of multiple progenitor domains contributes to interneuron diversity.
  • Understanding these origins is key to comprehending cortical development and function.

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