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. 1985 Mar;47(3):367–372. doi: 10.1016/S0006-3495(85)83927-8

Raman spectroscopy of nerve fibers. A study of membrane lipids under steady state conditions.

M Pézolet, D Georgescauld
PMCID: PMC1435218  PMID: 3978206

Abstract

The molecular structures of different nerve fibers kept in good physiological conditions were studied by laser Raman spectroscopy. For myelinated nerves like the rat sciatic nerve, the Raman spectrum is dominated by bands due to the lipid component of the myelin sheath. The temperature dependence of these bands does not reveal any thermotropic phase transition between 0 and 40 degrees C. There is, however, with temperature, a linear increase in the intermolecular disorder that is accompanied by an increase in the number of gauche bonds of the phospholipid acyl chains. For unmyelinated nerves such as the lobster leg nerve, the C-H stretching region of the Raman spectrum is covered by bands arising from the protein component of the axoplasm. However, for the garfish olfactory nerve that has a high density of excitable membranes, phospholipid bands are observed and can be used as intrinsic structural probes of the excitable membranes. The relative intensity of these bands is also temperature dependent.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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