|
|
|||
|
|
|
|
|
|
| Medical Encyclopedia | |||||||||
|
|||||||||
![]() Sleep patterns change with age, anxiety levels and many other factors. Normally, younger people have more concetrated periods of deep sleep and older people have more periods of REM sleep. |
| Health Topics | Drug Information | Dictionaries | Directories | Other Resources |
|
U.S. National Library of Medicine, 8600 Rockville Pike, Bethesda, MD 20894
Copyright and Privacy Policy, We welcome your comments. |