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Related Concept Videos

Neural Circuits01:25

Neural Circuits

Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neurulation01:30

Neurulation

Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the anterior...
Neuronal Communication01:28

Neuronal Communication

Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

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.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...

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Related Experiment Video

Updated: Jun 23, 2026

Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits
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Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits

Published on: April 15, 2015

Molecular mechanisms underlying neural circuit formation.

Bai Lu1, Kuan Hong Wang, Akinao Nose

  • 1Section on Neural Development & Plasticity, NICHD, National Institutes of Health, Bethesda, MD 20892, United States. bailu@mail.nih.gov

Current Opinion in Neurobiology
|May 22, 2009
PubMed
Summary

Neural circuit formation relies on molecular signals and neuronal activity to regulate synapse development. Specific transcription factors and brain-derived neurotrophic factor (BDNF) promote inhibitory synapse formation in the cortex.

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Assaying Circuit Specific Regulation of Adult Hippocampal Neural Precursor Cells
08:52

Assaying Circuit Specific Regulation of Adult Hippocampal Neural Precursor Cells

Published on: July 24, 2019

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Molecular Biology

Background:

  • Neural circuits, essential for nervous system function, are shaped by development and experience.
  • Synaptic connectivity, regulated by molecular signals and neuronal activity, is crucial for neural circuit assembly.
  • Both synaptogenic and antisynaptogenic factors contribute to the precise timing and specificity of circuit formation.

Purpose of the Study:

  • To explore the molecular mechanisms governing neural circuit formation.
  • To understand how neuronal activity influences the balance of excitatory and inhibitory synapses.
  • To identify factors regulating cortical inhibitory circuits and GABAergic synapse formation.

Main Methods:

  • Review of existing literature on synapse formation and neural circuit development.
  • Analysis of studies identifying synaptogenic and antisynaptogenic molecules.
  • Examination of research on activity-dependent regulation of synaptic plasticity and gene expression.

Main Results:

  • Identification of numerous molecules involved in synapse formation, including both promoters and inhibitors.
  • Evidence that neuronal activity dynamically regulates the balance between excitatory and inhibitory synapses.
  • Discovery that specific transcription factors and activity-dependent BDNF transcription promote GABAergic synapse formation in cortical circuits.

Conclusions:

  • Synaptic molecule regulation and neuronal activity are key determinants of neural circuit assembly.
  • Antisynaptogenic factors play a critical role in ensuring the specificity and timing of circuit formation.
  • Transcription factors and BDNF signaling represent important targets for understanding and potentially modulating cortical inhibitory circuit development.