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(electromagnetic? wtf?)
 
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[[Image:eeg_alpha.svg|thumb|Alpha waves |400px|right]]
 
[[Image:eeg_alpha.svg|thumb|Alpha waves |400px|right]]
'''Alpha waves''' are electromagnetic oscillations in the frequency range of 8-12 [[Hertz|Hz]] arising from ''synchronous'' and ''coherent'' (''in phase'' / ''constructive'') electrical activity of large groups of neurons in the human brain. They are also called [[Hans Berger|Berger]]'s wave in memory of the founder of EEG.
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'''Alpha waves''' are oscillations in the brain wave frequency of 8-12 [[Hertz|Hz]] arising from ''synchronous'' and ''coherent'' (''in phase'' / ''constructive'') electrical activity of large groups of neurons in the human brain. They are also called [[Hans Berger|Berger]]'s wave in memory of the founder of EEG.
   
 
''Alpha waves'' are commonly detected by [[electroencephalography]] (EEG) or [[magnetoencephalography]] (MEG) and predominantly found to originate from the [[occipital lobe]] during periods of relaxation, with eyes closed but still awake. Conversely alpha waves are attenuated with open eyes as well as by drowsiness and sleep. They are thought to represent the activity of the [[visual cortex]] in an idle state.
 
''Alpha waves'' are commonly detected by [[electroencephalography]] (EEG) or [[magnetoencephalography]] (MEG) and predominantly found to originate from the [[occipital lobe]] during periods of relaxation, with eyes closed but still awake. Conversely alpha waves are attenuated with open eyes as well as by drowsiness and sleep. They are thought to represent the activity of the [[visual cortex]] in an idle state.
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An alpha-like normal variant called [[Mu rhythm|mu (μ)]] is sometimes seen over the [[motor cortex]] (central scalp) and attenuates with [[movement]], or even with the intention to move.
 
An alpha-like normal variant called [[Mu rhythm|mu (μ)]] is sometimes seen over the [[motor cortex]] (central scalp) and attenuates with [[movement]], or even with the intention to move.
   
EEG [[Biofeedback]] Training (often called ''neurotherapy'' or [[neurofeedback]]) is a learning strategy that enables persons to alter their brain waves by getting a [[feedback]] of their present state. ''Alpha Biofeedback'' has been popular since the 1970s. Increased alpha activities have been reported in persons practicing both [[Yoga]] and [[Zen]] [http://www.scand-yoga.org/english/bindu/bindu12/hoffman.html], [http://biocybernaut.com/benefits/peak-meditate.html].
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EEG [[Biofeedback]] Training (often called ''neurotherapy'' or [[neurofeedback]]) is a learning strategy that enables persons to alter their brain waves by getting a [[feedback]] of their present state. ''Alpha Biofeedback'' has been popular since the 1970s. Increased alpha activities have been reported in persons practicing both [[Yoga]] and [[Zen]] [http://www.scand-yoga.org/english/bindu/bindu12/hoffman.html], [http://biocybernaut.com/benefits/peak-meditate.html].
   
 
Neurofeedback is claimed to be effective as an adjunct therapy for [[ADHD]].
 
Neurofeedback is claimed to be effective as an adjunct therapy for [[ADHD]].
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* {{Harvard reference | Surname = Brazier | Given = M. A. B. | Title = The Electrical Activity of the Nervous System | Year = 1970 | Publisher = Pitman | Place = London}}
 
* {{Harvard reference | Surname = Brazier | Given = M. A. B. | Title = The Electrical Activity of the Nervous System | Year = 1970 | Publisher = Pitman | Place = London}}
   
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:ru:Альфа-ритм
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{{enWP|Alpha wave}}
 
[[Category:Medical diagnosis]]
 
[[Category:Medical diagnosis]]
 
[[Category:Meditation]]
 
[[Category:Meditation]]
 
 
[[Category:Electroencephalography]]
 
[[Category:Electroencephalography]]
 
[[Category:Biofeedback]]
 
[[Category:Biofeedback]]
 
[[Category:Electrophysiology]]
 
[[Category:Electrophysiology]]
 
:ru:Альфа-ритм
 
{{enWP|Alpha wave}}
 

Latest revision as of 19:18, January 8, 2012

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Eeg alpha
Alpha waves
LifeartistAdded by Lifeartist

Alpha waves are oscillations in the brain wave frequency of 8-12 Hz arising from synchronous and coherent (in phase / constructive) electrical activity of large groups of neurons in the human brain. They are also called Berger's wave in memory of the founder of EEG.

Alpha waves are commonly detected by electroencephalography (EEG) or magnetoencephalography (MEG) and predominantly found to originate from the occipital lobe during periods of relaxation, with eyes closed but still awake. Conversely alpha waves are attenuated with open eyes as well as by drowsiness and sleep. They are thought to represent the activity of the visual cortex in an idle state.

An alpha-like normal variant called mu (μ) is sometimes seen over the motor cortex (central scalp) and attenuates with movement, or even with the intention to move.

EEG Biofeedback Training (often called neurotherapy or neurofeedback) is a learning strategy that enables persons to alter their brain waves by getting a feedback of their present state. Alpha Biofeedback has been popular since the 1970s. Increased alpha activities have been reported in persons practicing both Yoga and Zen [1], [2].

Neurofeedback is claimed to be effective as an adjunct therapy for ADHD.


See alsoEdit

References Edit

  • Brazier, M. A. B. (1970), The Electrical Activity of the Nervous System, London: Pitman


ru:Альфа-ритм
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