Similarly, infants with neurological problems tend to exhibit abnormal sleep patterns. (child-encyclopedia.com)
The problem is, pregnancy can lead to a lot of sleep difficulties including abnormal sleeping patterns and restless leg syndrome, according to SleepMed, a sleep disorder center in Santa Barbara. (momlifetv.com)
To see whether they could establish a link between the circadian clock, sleep, and mood, scientists in the new study looked at the genetics of a family that suffers from abnormal sleep patterns and mood disorders, including SAD and something called advanced sleep phase, a condition in which people wake earlier and sleep earlier than normal. (sciencemag.org)