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Related Concept Videos

The Neuromuscular Junction01:19

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The nervous system consists of complex motor neuron circuits, including upper motor neurons originating from the cerebral cortex and lower motor neurons starting in the spinal cord, coordinating both voluntary and involuntary movements. Among these, somatic motor neurons activate skeletal muscles and are classified into alpha, beta, and gamma types. Alpha neurons are vital for voluntary movement coordination, while gamma neurons adjust muscle spindle sensitivity, and the function of beta...
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The myelin sheath is a multilayered lipid and protein covering that insulates the axon of a neuron, enhancing the speed of nerve impulse conduction. Axons without this sheath are referred to as unmyelinated. Two types of neuroglia, Schwann cells in the peripheral nervous system (PNS) and oligodendrocytes in the central nervous system (CNS) are responsible for producing myelin sheaths.
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The site of chemical communication between a motor neuron and a muscle fiber is called the neuromuscular junction (NMJ). The end of the motor neuron at the NMJ divides into a cluster of synaptic end bulbs. The cytoplasm of these bulbs consists of synaptic vesicles enclosing acetylcholine molecules, the principal neurotransmitter released at the NMJ. The region opposite the synaptic bulb that ends in the muscle fiber is called the motor end plate, which has acetylcholine receptors. Within the...
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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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Related Experiment Video

Updated: Dec 26, 2025

Visualizing the Morphological Characteristics of Neuromuscular Junction in Rat Medial Gastrocnemius Muscle
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Perisynaptic schwann cells - The multitasking cells at the developing neuromuscular junctions.

Paloma Alvarez-Suarez1, Marta Gawor1, Tomasz J Prószyński2

  • 1Nencki Institute of Experimental Biology Polish Academy of Sciences, 3 Pasteur Street, 02-093, Warsaw, Poland.

Seminars in Cell & Developmental Biology
|March 10, 2020
PubMed
Summary

Perisynaptic Schwann cells (PSCs) are crucial glial cells at neuromuscular junctions (NMJs). This review details their diverse roles in synapse formation, maintenance, and disassembly.

Keywords:
AChRAcetylcholine receptorsGliaMotor neuronNeuromuscular junctionPerisynaptic Schwann cells

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Peripheral Nervous System Research

Background:

  • Neuromuscular junctions (NMJs) are vital for muscle contraction, serving as key models for synapse research.
  • NMJs, like central nervous system synapses, involve presynaptic terminals, postsynaptic muscle membranes, and glial cells.
  • Terminal Schwann cells, also known as perisynaptic Schwann cells (PSCs), are specialized glial cells unique to NMJs.

Purpose of the Study:

  • To review the multifaceted functions of perisynaptic Schwann cells (PSCs) at neuromuscular junctions (NMJs).
  • To consolidate decades of research and recent discoveries regarding PSC roles throughout synaptic development and function.

Main Methods:

  • Literature review of studies on neuromuscular junctions and perisynaptic Schwann cells.
  • Synthesis of findings from decades of research and recent discoveries in the field.

Main Results:

  • PSCs play critical roles at multiple stages of NMJ development and function.
  • Functions span from synapse formation and maintenance to disassembly.
  • Recent discoveries highlight novel roles and complexities of PSC involvement.

Conclusions:

  • Perisynaptic Schwann cells are integral to neuromuscular junction organization and function.
  • Understanding PSCs is essential for comprehending synaptic plasticity and repair.
  • Further research into PSCs promises insights into neurological disorders affecting NMJs.