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 did I miss that? LOL
Well, in a straight answer (from my previous post) it appears that:
Waking shows more Potassium salt and less Calcium, Magnesium and less water present in the brain cells.
Sleeping or anesthesia shows less Potassium salt but more Calcium, Magnesium and water present in the brain cells.
“increasing the extracellular volume” hints at another recent finding that your brain cells grow and shrink with the sleep cycle, allowing space between the cells, to allow a better flow of fluid, for the transfer of nutrients in, and waste products out of the cells.
It might even be the same study.
That physical change has some bearing on the reason it takes you a while to wake up in the morning.
Stop it and answer the question I want to know too!