> That said, the entire claim which precipitated this discussion - that ADHD is somehow related to sleep deprivation - is completely preposterous. There's quit

> That said, the entire claim which precipitated this discussion - that ADHD is somehow related to sleep deprivation - is completely preposterous. There's quite a bit of research on the subject, and researchers don't generally consider a relationship preposterous. It's reasonably well established that sleep disturbances and sleep deprivation can at least exacerbate the symptoms of ADHD. Some research suggests that they may also be a risk factor for developing the condition in some cases, or alternately (depending on unresolved questions about etiology) that a differential diagnosis is needed to distinguish non-sleep-related ADHD from symptoms related to sleep disorders. The diagnoses do empirically seem to co-occur quite frequently, which is one factor driving the research, but the mechanisms aren't well understood. Nature published a short review of the (very large) literature on the subject last year: J. Cassof et al., Sleep patterns and the risk for ADHD: a review, Nature 2012(4): 73-80.