Difference between revisions of "Alpha rhythm"

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m (EEGpedia moved page Alpha Rhythm to Alpha rhythm)
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Frequency: 8-13 Hz
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'''Alpha rhythm'''
 
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*Frequency: 8-13 Hz
Posterior dominant
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*Posterior maximum
 
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*Amplitude: 10-80 microV
Amplitude: 10-80 microV
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*Wax and wane in amplitude
 
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*Most prominent with eyes closed and relaxed
Suppressed with eyes open or mental tension
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*Suppressed with eyes open, mental stress or sleep
 
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*Left-right difference <0.5 Hz in frequency and <50% in amplitude (amplitude is usually higher on the right side)
 
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*Frequency is age dependant
[[image:Logo.png]]
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**0-3 months: No posterior basic rhythm
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**4 months: 3-4 Hz
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**5 months: 5 Hz
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**1 years: 6-7 Hz
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**3 years: 8 Hz
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**7 years: 9 Hz
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**> 60 years: Decrease by 0.08 Hz/year

Revision as of 10:58, 14 February 2017

Alpha rhythm

  • Frequency: 8-13 Hz
  • Posterior maximum
  • Amplitude: 10-80 microV
  • Wax and wane in amplitude
  • Most prominent with eyes closed and relaxed
  • Suppressed with eyes open, mental stress or sleep
  • Left-right difference <0.5 Hz in frequency and <50% in amplitude (amplitude is usually higher on the right side)
  • Frequency is age dependant
    • 0-3 months: No posterior basic rhythm
    • 4 months: 3-4 Hz
    • 5 months: 5 Hz
    • 1 years: 6-7 Hz
    • 3 years: 8 Hz
    • 7 years: 9 Hz
    • > 60 years: Decrease by 0.08 Hz/year