Causes. Oral herpes is a common infection of the mouth area. It is caused by the herpes simplex virus type 1 (HSV-1). Most people in the United States are infected with this virus by age 20. After the first infection, the virus goes to sleep (becomes dormant) in the nerve tissues in the face.
Sleep: Also known as Sleep or Standby. In sleep mode, the computer enters a low-power state. Power is used to keep the computerâs state in memory, but other parts of the computer are shut down and wonât use any power. When you turn on the computer, it will snap back to life within just a few seconds.
REM sleep is an active mind inside a paralyzed body, while nREM sleep is a resting mind inside a functioning body. This is why sleepwalking is possible during nREM sleep and not during REM sleep: your body is paralyzed during REM sleep but not in nREM. As for why sleepwalking occurs... well, we still don't really know. See Wikipedia: Sleepwalking for much of the current knowledge.