Symptoms of a urinary tract infection (UTI) may include: Pain or burning when you urinate. An urge to urinate frequently but usually passing only small amounts of urine. Pain in the lower belly.
For our purposes, it suffices to say that one sleep cycle lasts an average of 90 minutes: 65 minutes of normal, or non-REM (rapid eye movement), sleep; 20 minutes of REM sleep (in which we dream); and a final 5 minutes of non-REM sleep.
REM SLEEP. By Michelle Lease. The mind and body go through several different stages during the course of sleeping. Rapid Eye Movement (REM) sleep accounts for approximately two hours of the total sleep cycle, with the average person experiencing as many as six cycles of REM in an eight hour sleep period. REM sleep is a time of interesting activity. The heartbeat quickens, body temperature lowers, the eyes move rapidly from side to side and other physiological events can occur, including vaginal lubrication and penile erections.