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.
(A) 20-sec epoch. (B) Faster tracings in the region outlined by the solid bar in A. Chin R-Chin L, chin electromyogram; C3, C4, F3, F4, O1, O2, M1, M2 are electroencephalography tracings from left and right central, frontal, occipital and mastoid electrodes; E1 and E2, left and right eye electrodes. EKG, electrocardiogram.
