OverviewSleep patterns change with age, anxiety levels and many other factors. Normally, younger people have more concentrated periods of deep sleep compared to older people.
Update Date 12/2/2014
Updated by: Andrew Schriber, MD, FCCP, Specialist in Pulmonary, Critical Care, and Sleep Medicine, Virtual Memorial Hospital, Mount Holly, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.