[robg]

More efficient sleep is possible with ultrasound. But keep in mind that the glymphatic system seems to expand as other systems contract. The waves are tied to brain activity slowing down, can’t have one without the other. That said, could intersperse active times of the day with naps. But naps alone don’t seem sufficient as good sleep.

[krisoft]

> The waves are tied to brain activity slowing down, can’t have one without the other.

But why? Is this knowledge onservation based (“that is how it is in the organisms we studied”) or is it a theoretical limit?

Dolphins for example seems to get by without fully going unconscious. (I’m talking about the literal marine mamals, not a chronotype or anything like that here.)

[rowanG077]

To what degree is it more efficient? For example could you halve your sleep requirement? That would already be huge.

[pedalpete]

The waves are actually tied to the synchronous firing of neurons which is the hallmark of deep sleep.