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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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Related Experiment Video

Updated: Feb 20, 2026

Preparation and Immunostaining of Myelinating Organotypic Cerebellar Slice Cultures
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Myelin dynamics: protecting and shaping neuronal functions.

Aiman S Saab1, Klaus-Armin Nave2

  • 1Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland; Neuroscience Center Zurich, University and ETH Zurich, Zurich, Switzerland.

Current Opinion in Neurobiology
|October 25, 2017
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Summary

Oligodendrocytes, the myelinating cells in the brain, are crucial for neuronal function, energy supply, and long-term axonal health. Understanding how these glial cells adapt their myelination in adults is key to brain function and aging.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Glial Biology

Background:

  • Myelinating glial cells, such as oligodendrocytes, insulate axons, enhancing action potential propagation.
  • Myelination, regulated by oligodendrocytes through myelin sheath thickness and internode length, is vital for fine-tuning brain computation.
  • Proper myelination is essential for motor learning, social behaviors, and overall brain function.

Purpose of the Study:

  • To investigate the role of oligodendrocytes in fine-tuning brain functions throughout life.
  • To understand how oligodendrocytes sense neuronal activity and adjust metabolic support in the adult central nervous system (CNS).
  • To explore the implications of myelination and oligodendrocyte function in higher brain functions and cognitive decline.

Main Methods:

  • The study focuses on the functional aspects of oligodendrocytes and myelination in the adult CNS.
  • It examines the interplay between neurons and glial cells, including metabolic support and axonal integrity.
  • The research involves understanding the adaptive mechanisms of myelination in response to neuronal activity.

Main Results:

  • Oligodendrocytes provide essential metabolic support to neurons, regulating the ionic environment and fueling energy demands.
  • The axon-glial interplay mediated by oligodendrocytes is critical for maintaining long-term axonal integrity and neuronal survival.
  • Dysregulation of myelination and oligodendrocyte function is linked to neuropsychiatric diseases and cognitive decline.

Conclusions:

  • Fine-tuning of myelination by oligodendrocytes is crucial for higher brain functions and cognitive processes.
  • Understanding oligodendrocyte adaptation in the adult CNS is critical for addressing cognitive decline associated with aging and myelin abnormalities.
  • Further research into the dynamic regulation of myelination and glial metabolic support will illuminate brain function and disease.