Correlation of regional cerebral blood flow and change of plasma sodium concentration during genesis and satiation of thirst.
Positron emission tomography studies were conducted during genesis of moderate thirst by rapid i.v. infusion of hypertonic saline (0.51 M) and after satiation of thirst by drinking water. The correlation of regional cerebral blood flow with the change in the plasma Na concentration showed a significant group of cerebral activations in the anterior cingulate region and also a site in the middle temporal gyrus and in the periaqueductal gray. Strongest deactivations occurred in the parahippocampal and frontal gyri. The data are consistent with an important role of the anterior cingulate in the genesis of thirst.
Howard Florey Institute of Experimental Physiology and Medicine, University of Melbourne, Parkville, Victoria 3052, Australia.
D
D
Denton
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R
Shade
F
F
Zamarippa
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G
Egan
J
J
Blair-West
M
M
McKinley
P
P
Fox
D000328:Adult; D001921:Brain / Q000098:blood supply / Q000000981:diagnostic imaging / Q000502:physiology*; D001931:Brain Mapping; D002560:Cerebrovascular Circulation / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010104:Oxygen Radioisotopes / Q000493:pharmacokinetics; D012039:Regional Blood Flow; D012527:Satiation / Q000502:physiology*; D012964:Sodium / Q000097:blood*; D013894:Thirst / Q000502:physiology*; D014055:Tomography, Emission-Computed
D010104:Oxygen Radioisotopes; D012964:Sodium