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Updated: Jun 20, 2026

Preparation and Immunostaining of Myelinating Organotypic Cerebellar Slice Cultures

Preparation and Immunostaining of Myelinating Organotypic Cerebellar Slice Cultures

Published on: March 20, 2019

What is myelin?

Daniel K Hartline¹

¹Pacific Biosciences Research Center, University of Hawaii at Manoa, Honolulu, 96822, USA. danh@hawaii.edu

Neuron Glia Biology

|September 10, 2009

Summary

This summary is machine-generated.

Convergent evolution of myelin-like axonal sheaths in invertebrates offers insights into essential structural features for impulse speed and energy efficiency. Not all observed features are critical for these functions, suggesting evolutionary flexibility.

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Preparation and Immunostaining of Myelinating Organotypic Cerebellar Slice Cultures

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Area of Science:

Neuroscience
Evolutionary Biology
Comparative Anatomy

Background:

Axonal sheaths with myelin-like properties have evolved convergently in invertebrates.
Understanding these structures aids in appreciating the evolution of vertebrate myelin.

Purpose of the Study:

To identify essential structural features of axonal sheaths for impulse speed enhancement and energy savings.
To compare invertebrate and vertebrate myelin structures and functions.

Main Methods:

Review of early histological and functional studies on myelin.
Examination of electron microscopy findings on invertebrate and vertebrate axonal sheaths.
Analysis of structural features for their necessity in functional enhancement.

Main Results:

Key features include osmiophilia, negative birefringence, and saltatory conduction.
Electron microscopy reveals commonalities like lipid membrane multiplicity, condensation, marginal seals, and nodes.
Features like membrane compaction, spiral wrapping, glial involvement, and nodes are not universally essential for speed enhancement.

Conclusions:

The evolution of myelin-like sheaths demonstrates significant structural permissiveness.
Convergent evolution highlights adaptable features crucial for nerve impulse transmission efficiency.