NUR 163 Notes Week 8 Sleep revised and answered correctly.

k 8 What is Sleep?  It is a natural process that is necessary for optimal health  It involves a shift in physiological and neurological activity  It is intended to be a restorative process Normal Physiological Process  Under normal circumstances it occurs in stages, in a fairly consistent pattern Two major Categories  Non-Rapid Eye movement  Rapid Eye Movement Non-Rapid Eye Movement has Four Stages Stage 1 –  Light sleep, person can be awakened easily  Can drift in and out of sleep hallucinations can occur  Uncontrolled muscle jerks can occur Stage 2 –  Eye movement ceases  Brain waves become even slower  Pulse rate and respirations slow down and body temperature drops. Stage 3 –  Deep sleep characterized by very slow brain waves called Delta Waves  Delta Waves are smaller and faster waves Stage 4 –  Exclusively Delta Waves  During this stage it can be difficult to wake  Muscle Activity is very limited or completely absent REM – Rapid Eye movement sleep  Commonly begins approx. 90 minutes after onset of sleep.  May last as long as 30 minutes to 1 hour  Autonomic response of rapid eye movement  Fluctuating Heart Rate and Respiratory Rates and increase fluctuating blood pressure  Brain Activity is similar to those when a person is awake but muscles are paralyzed, which prevents movement.  Sleep is an essential component of Life.  Sufficient quality sleep is crucial to metabolic regulation, cognitive function, quality of life and mood.  Decreases risk for chronic conditions that affect that respiratory, cardiovascular, neuro an