A new study suggests there's more to sleep than how long you snooze each night. Your overall sleep pattern could shape your mood, brain function and even long-term health. Researchers from Concordia University in Montreal identified five distinct sleep profiles that may help explain why some people feel well-rested while others struggle with fatigue, poor focus or emotional ups and downs. The findings, published Tuesday in PLOS Biology , show that these "sleep-biopsychosocial profiles" reflect