Posted by Ted (205.188.198.176) on August 28, 2001 at 12:09:39:
In Reply to: common thread posted by Darren Clarke on August 28, 2001 at 11:38:00:
that neither causes either but one triggers the other since they both are preceeded by a drop in blood-oxygen levels and hit in the early phase of REM sleep (although, CHs occur at many other times as well).