By Sharmain Cornette. âAbout two percent of the patients who undergo open-heart surgery worldwide end up with a stroke.â This notion was amplified yesterday by Chief Executive Officer of the Caribbean Heart Institute (CHI), Dr Gary Stephens, during an interview with this newspaper.
Dreams mainly occur in the rapid-eye movement (REM) stage of sleepâwhen brain activity is high and resembles that of being awake. REM sleep is revealed by continuous movements of the eyes during sleep. At times, dreams may occur during other stages of sleep. However, these dreams tend to be much less vivid or memorable. The length of a dream can vary; they may last for a few seconds, or approximately 20â30 minutes.
Sleep terrors are different than nightmares in that they occur during non-REM sleep, while nightmares typically happen during REM sleep. Sleep terrors usually occur early in the night and can include arousal, agitation, large pupils, sweating and increased blood pressure for the sleeper. The sleeper typically does not remember the dream by the time they wake up[1].