Difference between revisions of "Alpha rhythm"
From EEGpedia
m (EEGpedia moved page Alpha Rhythm to Alpha rhythm) |
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| − | Frequency: 8-13 Hz | + | '''Alpha rhythm''' |
| − | + | *Frequency: 8-13 Hz | |
| − | Posterior | + | *Posterior maximum |
| − | + | *Amplitude: 10-80 microV | |
| − | Amplitude: 10-80 microV | + | *Wax and wane in amplitude |
| − | + | *Most prominent with eyes closed and relaxed | |
| − | Suppressed with eyes open | + | *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 | ||
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
