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Related Concept Videos

Synaptic Signaling01:09

Synaptic Signaling

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
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Synaptic Signaling01:12

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
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Chemotaxis and Direction of Cell Migration01:21

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Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
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The Synapse02:47

The Synapse

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Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
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Neuronal Communication01:28

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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...
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Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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Related Experiment Video

Updated: Feb 20, 2026

Ex Utero Electroporation and Organotypic Slice Cultures of Embryonic Mouse Brains for Live-Imaging of Migrating GABAergic Interneurons
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Ex Utero Electroporation and Organotypic Slice Cultures of Embryonic Mouse Brains for Live-Imaging of Migrating GABAergic Interneurons

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Synaptic input as a directional cue for migrating interneuron precursors.

Annika K Wefers1,2, Christian Haberlandt2, Nuriye B Tekin3

  • 1Anatomisches Institut, Anatomie & Zellbiologie, Medizinische Fakultät, University of Bonn, 53115 Bonn, Germany.

Development (Cambridge, England)
|October 25, 2017
PubMed
Summary
This summary is machine-generated.

Early synaptic connections guide developing neurons. Blocking these synapses impairs neuronal migration and pathfinding, revealing a novel role for neurotransmission in central nervous system development.

Keywords:
CerebellumInterneuron precursor cellsMigrationMousePax2Synapses

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • Neuronal migration is crucial for central nervous system (CNS) development.
  • Mechanisms regulating interneuron dispersal and circuit integration are not fully understood.
  • Classical neurotransmitters are known regulators of neuronal motility.

Purpose of the Study:

  • To investigate the role of early synaptic communication in the migration of cerebellar interneuron precursors.
  • To elucidate the mechanisms by which neurotransmission influences neuronal pathfinding during development.

Main Methods:

  • Time-lapse video microscopy of developing mouse cerebella.
  • Electrophysiological analysis of interneuron precursors.
  • Pharmacological manipulation of synaptic vesicle release and exocytosis.

Main Results:

  • Cerebellar interneuron precursors exhibit spontaneous postsynaptic currents before settling.
  • Blocking synaptic communication significantly slows interneuron precursor migration.
  • Inhibition of exocytosis primarily impairs the directional persistence of migrating interneuron precursors.

Conclusions:

  • Early synaptic innervation plays an unprecedented role in regulating migrating neuronal precursors.
  • Synaptic function is critical for neuronal migration and pathfinding during CNS development.
  • This study reveals a novel mechanism controlling interneuron dispersal and microcircuit formation.