Sodium-level-sensitive Sodium Channel and Salt-Intake Behavior

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Abstract
Mammals feel thirsty or develop an appetite for salt when the correct balance between water and sodium in the body fluid has been disrupted, but little is known about the mechanism in the brain that controls salt homeostasis. It has been postulated that the existence of both an osmoreceptor and a specific sodium receptor is required to accommodate the experimental data (Johnson and Edwards, 1990; Denton et al., 1996). Several candidate osmoreceptors have been reported (Oliet and Bourque, 1993; Wells, 1998; Liedtke et al., 2000); however, a specific sodium receptor has not been identified.

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