Stages of Sleep: II, III, IV
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Questions and Answers

Which brainwave pattern is characterized by high frequency waves of 15 to 60 per second and low amplitude of 5 to 10 µV?

  • Theta waves
  • Alpha rhythm
  • Beta rhythm (correct)
  • Delta waves

    • What happens to the alpha waves in EEG when the eyes are opened?

  • They become desynchronized (correct)
  • They disappear
  • They get stronger
  • Their frequency increases

    • In which type of mental state would you expect to observe alpha rhythm in EEG?

  • During peak performance state
  • Inattentive brain or mind like drowsiness (correct)
  • During REM sleep
  • In NREM sleep

    • What is the frequency range of alpha waves in EEG?

    <p>8 to 12 per second</p> Signup and view all the answers

    What is the effect of visual stimuli or mental effort on alpha rhythm?

    <p>Causes it to disappear</p> Signup and view all the answers

    Which type of waves replace synchronized alpha waves when the eyes are opened?

    <p>Beta waves</p> Signup and view all the answers

    When does alpha block occur in EEG recordings?

    <p>When solving arithmetic problems</p> Signup and view all the answers

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