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When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
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A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
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Updated: Aug 9, 2025

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Deciphering inhibitory neuron development: The paths to diversity.

Rachel C Bandler1, Christian Mayer2

  • 1Yale University, Department of Psychiatry, New Haven, CT 06510, USA; Max Planck Institute for Biological Intelligence, Martinsried, 82152, Germany. Electronic address: https://twitter.com/Rachel_Bandler.

Current Opinion in Neurobiology
|February 22, 2023
PubMed
Summary
This summary is machine-generated.

Understanding inhibitory (GABAergic) neuron diversity is key to brain function. New single-cell sequencing insights reveal how progenitor cell fate decisions, birthdate, and origin shape these crucial neuronal subtypes.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Inhibitory (GABAergic) neurons are vital for neuronal diversity and specialized brain circuits.
  • These neurons originate from ventral embryonic brain progenitors.
  • GABAergic neurons encompass heterogeneous subtypes, including interneurons and projection neurons.

Purpose of the Study:

  • To review current understanding of GABAergic neuron diversity.
  • To explore how progenitor cell fate decisions influence neuronal development.
  • To highlight the role of single-cell sequencing in revealing developmental insights.

Main Methods:

  • Review of existing literature on GABAergic neuron development.
  • Analysis of single-cell sequencing data to understand progenitor cell dynamics.
  • Focus on the interplay between birthdate, origin, and cell fate.

Main Results:

  • GABAergic neuron differentiation begins early in progenitor domains.
  • Key drivers of differentiation include progenitor birthdate and place of origin.
  • Single-cell sequencing provides novel insights into the emergence of neuronal diversity.

Conclusions:

  • Progenitor cell fate regulation is fundamental to generating GABAergic neuron diversity.
  • Understanding these early developmental events is crucial for comprehending brain function.
  • Advanced sequencing technologies are transforming our knowledge of neuronal development.