waking at 3:00 / 4:00 am

[Shannon Nelson]

Can someone remind me what organ systems either of these waking times
relate to?

I'm also curious how reliable and useful people find these waking
times to be? I'm working on someone who says "I keep waking at 3:00
a.m)--and unfortunately the remedy I've been *strongly* leaning toward
is not under 3:00, but is italics under 4:00. I'm thinking not to let
that in itself turn me away from it, but--anyone have thoughts?

Thanks,
Shannon