NREM

• NREM (80%)

  • Non-Rapid Eye Movement; characterised by a progressive decline in the physiological activity
• Stage 1 (N1) - Light Sleep

  • Transitional period between wakefulness and sleep; physiological responses slow; brain activity, heart rate, body temp
• Stage 2(N2) - Light Sleep

  • can still be woken, but bursts of brain activity help resist being woken from environmental stimuli, the stage experienced the most through sleep episode
• Stage 3(N3) - Deep Sleep

  • Physiological responses are at their slowest + most difficult to wake. Known as slow-wave sleep.
  • Experienced more in first half of night than second half
• body is repairing itself