Deep Sleep ?

[Dinko Gonzalez Trotter]

Hello.  Do any of you know of a condition known as "disautonomy" (Sp?).
It manifests via periodic, strong lethargy.  The person falls asleep some-
times for more than 24 hs, their heart rate drops a lot and are almost 
impossible to wake up.  After the unusually long sleep, they regain    
conciousness 
without further symptoms.  These episodes repeat with a frequency of once
every 6 months or so.   This description may not be complete, but I'd
appreciate if someone could direct me to a source where I could find out
more about neurological disorders with these symptoms.  Thank you. 
-- 
______________________
Dinko Gonzalez Trotter

dinko at daytona.tunl.duke.edu