Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 1970 Oct;2(4):391-9.

The effects of naps on nocturnal sleep: influence on the need for stage-1 REM and stage 4 sleep

I Karacan, R L Williams, W W Finley, C J Hursch
  • PMID: 4320228

The effects of naps on nocturnal sleep: influence on the need for stage-1 REM and stage 4 sleep

I Karacan et al. Biol Psychiatry. 1970 Oct.
No abstract available

PubMed Disclaimer