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Brain Extracellular Space and the Sink Action of Cerebrospinal FluidMeasurement of Rabbit Brain Extracellular Space Using Sucrose Labeled With Carbon 14
William H. Oldendorf, MD;
Hugh Davson, DSc
Arch Neurol. 1967;17(2):196-205.
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To BE PRESENTED here are results of a series of animal experiments intended to measure the volume of extracellular space (ECS) in rabbit brain. These experiments were designed to test the hypothesis that a sink action of cerebrospinal fluid (CSF) removed solutes from nervous tissue ECS, resulting in substantial error in those methods based upon the volume of distribution of tracer substances believed to remain confined to the ECS when these substances were introduced into brain by way of blood. Sink action refers to diffusion of solutes down a concentration gradient from a region of high concentration to one of lower concentration.
In the usual method of measuring the volume of ECS of a tissue, an indicator substance that remains outside cells (an ECS label) is introduced into the blood and its concentration maintained constant for a time sufficient to allow the label to pass through the capillary walls in
. . . [Full Text PDF of this Article]
Author Affiliations
Los Angeles; London
From the Neurology Section, Wadsworth Hospital, Veterans Administration Center, Los Angeles (Dr. Oldendorf), and Medical Research Council, Department of Physiology, University College, London (Dr. Davson).
Footnotes
Submitted for publication Dec 13, 1966; accepted Feb 20, 1967.
Read before the meeting of the Los Angeles Society of Neurology and Psychiatry, Oct 19, 1966. Reprint requests to Wadsworth Hospital, Veterans Administration Center, Los Angeles 90073 (Dr. Oldendrof).
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