chapter 10

• consciousness


  experience of perceiving oneself and surroundings
• brain death


  the brain shows no activity and no response to any stimulus
• coma


  caused by a traumatic brain damage/medical indution,there is low level of activity with no response to any stimulus.
• vegetative state


  limited responses such as increased heart rate in response to pain
• circadian rhythm


  a cycle of activity or inactivity during the day.
• insomnia


  not enough sleep to feel rested the next day
• sleep apnea


  people stop to breath for a minute or more and then wake up gasping for breath.
• Narcolepsy


  sudden attacks of sleepiness during the day
• night terror


  causes someone to awaken scare, occur during satege 3 or stage 4 of sleep
• stages of sleep

  1. STAGE 1: falling asleep/light sleep
  2. STAGE 2: heart rate slows/ body temperature drops
  3. STAGE 3&4: deep sleep/muscles and tissues repair R.E.M. : body is paralyzed and dreams begin