Sleep stage 3 is distinguished from sleep stage 4 by the:

Sleep stage 3 is distinguished from sleep stage 4 by the:
 
  a. Presence of bursts of theta waves
  b. Presence of sleep spindles and k-complexes
  c. Percentage of large delta waves present on the electroencephalogram
  d. Percentage of relatively low-voltage, mixed-frequency waves

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Q. 2  What is the distinguishing feature of the electroencephalogram during sleep stages 3 and 4?
 
  a. Small beta waves c. Sleep spindles
  b. Large k-complexes d. Large delta waves

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Q. 3  Slow, rolling, pendulous movement of the eyes is present during which of the following sleep stages?
 
  a. Stage 1 sleep c. Stages 3 and 4 sleep
  b. Stage 2 sleep d. Rem sleep

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Q. 4  Which waveforms are present during wakefulness and during the onset of quiet sleep? 1. Alpha waves 2. Beta waves 3. Delta waves 4. Theta waves
 
  a. 1 and 2 c. 3 and 4
  b. 2 and 3 d. 1 and 4