Delayed sleep phase disorder essentially means going to sleep late and getting up late. In its more extreme form it's rare, but arguably there's a spectrum of varying degrees of night owlishness.
Non-24 sleep-wake disorder (which I have) can be a hard one for people to wrap their head's around. The internal body-clock cycles at the wrong rate and unlike in healthy people, fails to reset each day. My 'day' is almost 26 hours long. The condition is quite common among the blind but vanishingly rare in sighted individuals.
Irregular sleep-wake rhythm is pretty much what it sounds like. Sufferers sleep at random times, for random lengths of time, with no discernible pattern. Probably the rarest of them all.
These tend to present with other comorbidities, particularly depression and ADHD. I know of one other person in the non-24 community who has CFS, and a couple of others who had CFS-like symptoms for some years that were fixed by tryptophan in one case, and B12 injections in the other.
I'm very curious to see whether there's any apparent correlation from this side of things. Speaking for myself, it's sort of hard to believe that I have two such rare conditions without there being any linkage, but anything's possible I guess.
Non-24 sleep-wake disorder (which I have) can be a hard one for people to wrap their head's around. The internal body-clock cycles at the wrong rate and unlike in healthy people, fails to reset each day. My 'day' is almost 26 hours long. The condition is quite common among the blind but vanishingly rare in sighted individuals.
Irregular sleep-wake rhythm is pretty much what it sounds like. Sufferers sleep at random times, for random lengths of time, with no discernible pattern. Probably the rarest of them all.
These tend to present with other comorbidities, particularly depression and ADHD. I know of one other person in the non-24 community who has CFS, and a couple of others who had CFS-like symptoms for some years that were fixed by tryptophan in one case, and B12 injections in the other.
I'm very curious to see whether there's any apparent correlation from this side of things. Speaking for myself, it's sort of hard to believe that I have two such rare conditions without there being any linkage, but anything's possible I guess.