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Related Concept Videos

Neurulation01:30

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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...
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Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
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Related Experiment Video

Updated: Apr 14, 2026

Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development
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Neuronal polarization in the developing cerebral cortex.

Akira Sakakibara1, Yumiko Hatanaka2

  • 1College of Life and Health Sciences, Chubu University Kasugai, Japan.

Frontiers in Neuroscience
|April 24, 2015
PubMed
Summary
This summary is machine-generated.

Cortical neurons, both excitatory and inhibitory, establish polarity de novo during development. This process involves a multipolar stage, similar to hippocampal neurons, and is crucial for forming organized neuronal circuits.

Keywords:
axoncerebral cortexexcitatory cortical neuronimaginginhibitory cortical neuronneuronpolarization

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • Cortical neurons are fundamental to higher-order information processing.
  • Neuronal circuits rely on the precise connections between excitatory and inhibitory interneurons.
  • Understanding neuronal differentiation is key to comprehending brain development.

Purpose of the Study:

  • To review polarity formation in cortical neurons during development.
  • To describe the morphology and dynamic behavior of cortical neurons during polarization.
  • To discuss the cellular and molecular mechanisms driving neuronal polarization.

Main Methods:

  • Live imaging techniques to observe neuronal differentiation in vivo.
  • Analysis of neuronal morphology and dynamic behavior during development.
  • Review of existing literature on cellular and molecular mechanisms of polarization.

Main Results:

  • Cortical neurons establish polarity de novo through a multipolar stage.
  • This process is similar to polarity formation in dissociated hippocampal neurons.
  • Initial steps of axon establishment during neuronal polarization were examined.

Conclusions:

  • Polarity formation is a critical de novo process for both excitatory and inhibitory cortical neurons.
  • The multipolar stage is a conserved mechanism for establishing neuronal polarity.
  • Further research into cellular and molecular mechanisms can elucidate neuronal circuit development.