The lack of two related genes tied to autism may also disrupt the body's natural sleep cycle and cause further mental impairment, a new report says.
Mice lacking the fragile X mental retardation 1 gene (FMR1) and a similar gene called fragile X-related gene 2 (FXR2) have a very irregular, non-rhythmic sleep-wake pattern rather than the rodent's normal cycle of roughly under 12 hours awake and 12 hours asleep, according to a consortium of researchers led by scientists at Baylor College of Medicine in Houston.