Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Rat polysomnography. Experiment in a chronically instrumented rat (sleep experiment). Typical transition from non-REM to REM sleep. First arrow: point of conversion of theta/delta ratio to greater than 1. Second arrow: Start point of genioglossus activity measurements (low neck-muscle activity). Third arrow: End-point of genioglossus activity measurements (onset of tongue muscle twitches). EEG=electroencephalogram, EMG=electromyogram, REM=rapid-eye-movement.
