scholarly journals Time course of diffusion weighted image and apparent diffusion coefficient in acute spinal cord infarction: A case report and review of the literature

2016 ◽  
Vol 56 (5) ◽  
pp. 352-355 ◽  
Author(s):  
Sho Takeshita ◽  
Toshiyasu Ogata ◽  
Hidekazu Mera ◽  
Jun Tsugawa ◽  
Jiro Fukae ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Diffusion Coefficient ◽  
Case Report ◽  
Apparent Diffusion Coefficient ◽  
Time Course ◽  
Spinal Cord Infarction ◽  
Review Of The Literature ◽  
Diffusion Weighted Image ◽  
Weighted Image ◽  
Apparent Diffusion

Slow diffusion of Ca2+ in the rat's hippocampus

1981 ◽  
Vol 59 (9) ◽  
pp. 1022-1025 ◽  
Author(s):  
M. E. Morris ◽  
K. Krnjević
Keyword(s):  
Diffusion Coefficient ◽  
Apparent Diffusion Coefficient ◽  
Time Course ◽  
Transport Number ◽  
Dorsal Hippocampus ◽  
Simple Diffusion ◽  
Apparent Diffusion ◽  
Resultant Increase ◽  
Simple Diffusion Model

Ca2+-sensitive microelectrodes, attached to CaCl2-containing micropipettes, were inserted into the dorsal hippocampus of rats under urethane. When Ca2+ was released iontophoretically, the amplitude and time course of the resultant increase in extracellular Ca2+ concentration could be fitted to a simple diffusion model, but the apparent diffusion coefficient of Ca2+ was only about 1/100 of its value in water, possibly because of reversible Ca2+ binding to hippocampal tissue. A further anomaly was a very low transport number (<0.01) for the release of Ca2+ from microelectrodes in vivo.

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