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Proton Relaxation Studies of Water Compartmentalization in a Model Neurological System

✍ Scribed by R. S. Menon; M. S. Rusinko; P. S. Allen

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
746 KB
Volume
28
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Proton relaxation measurements from 18 crayfish abdominal nerve cords (a model of human CNS) are used to demonstrate that the transverse (though not the longitudinal) relaxation can be decomposed into four reproducible components that, in conjunction with optical and electron microscopy of the morphology, can be assigned to three water compartments within the cord and possibly to the mobile lipid protons. The assignments are extraaxonal water protons (32 Β± 9% and mean T~2~ = 600 Β± 200 ms), axonal water protons (59 Β± 12% and mean T~2~ = 200 Β± 30 ms), intramyelinic water protons (7 Β± 4% and mean T~2~ = 50 Β± 20 ms), and finally an unsubstantiated assignment of lipid protons (2.0 Β± 2.0% and mean T~2~ = 7 Β± 4 ms).Β© 1992 Academic Press,Inc.

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