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Related Concept Videos

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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Synaptic Signaling01:09

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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.
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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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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
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Related Experiment Video

Updated: Feb 13, 2026

In Vivo Gene Transfer to Schwann Cells in the Rodent Sciatic Nerve by Electroporation
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The Schwann Cell as an Active Synaptic Partner.

Sujin Hyung1,2, Kyuhwan Jung3, Sung-Rae Cho3,4

  • 1Department of Mechanical and Aerospace Engineering, Seoul National University, San 56-1, Shilim-dong, Gwanak-gu, Seoul, 08826, Korea.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
|March 16, 2018
PubMed
Summary

Schwann cells in the peripheral nervous system are crucial for synapse function, regulating neuronal excitability and neurotransmitter release through gliotransmitter secretion. Understanding their role in nerve-muscle signaling is essential for comprehending nervous system activity.

Keywords:
Ca2+ signalgliotransmitterneuron-glia interactionschwann cellsynapse

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Peripheral Nervous System Research

Background:

  • Schwann cells are vital for peripheral nervous system synapse formation, maintenance, and modulation.
  • These glial cells interact with neurons by recognizing signaling molecules and secreting gliotransmitters.
  • Schwann cell activity influences neuronal excitability and neurotransmitter release at the neuromuscular junction.

Purpose of the Study:

  • To highlight the indispensable role of Schwann cells in synaptic plasticity and nerve-muscle communication.
  • To emphasize the significance of gliotransmitter secretion and calcium signaling in synapse function.
  • To advocate for a revised understanding of nervous system activity that includes neuron-glia interactions.

Main Methods:

  • Review of existing literature on Schwann cell function in the peripheral nervous system.
  • Analysis of neuron-glia signaling pathways, including gliotransmitter secretion and calcium dynamics.
  • Examination of the interplay between Schwann cells and neurons at the neuromuscular junction.

Main Results:

  • Schwann cells actively participate in synapse modulation through gliotransmitter release.
  • Synchronized calcium (Ca2+) signaling in Schwann cells triggers gliotransmitter secretion, impacting nerve communication.
  • Neurotransmitters released by neurons can modulate intracellular calcium levels in Schwann cells.

Conclusions:

  • The traditional view of nervous system activity solely involving neuron-neuron and neuron-muscle signaling is incomplete.
  • Schwann cells play a critical and active role in regulating nerve-muscle signaling and synapse function.
  • Further research is needed to fully elucidate the complex interactions between Schwann cells and neurons in the peripheral nervous system.