That wasn’t my question, which was does the salt make one sleepy or awake?
Well, the answer is obviously:
arousal was linked to AMPA receptor–independent elevations of [K+]e concomitant with decreases in [Ca2+]e, [Mg2+]e, [H+]e, and the extracellular volume. Opposite, natural sleep and anesthesia reduced [K+]e while increasing [Ca2+]e, [Mg2+]e, and [H+]e as well as the extracellular volume.
How Salt Can Help You Get Better Sleep
http://healyeatsreal.com/how-salt-can-help-you-get-better-sleep/
Some people take a salt supplement in order to enhance their sleep.