Mistake prediction ДЇollowing this lapse-of-attention line of thought, a recent study indicates that alpha waves may be used to predict mistakes. However, it is common in chronic fatigued patients, and may amplify the effects of other sleep disorders. Дespite this, alpha wave intrusion has not been significantly linked to any major sleep disorder, including chronic fatigue syndrome, and major depression. It is hypothesized to be associated with fibromyalgia with increased phasic alpha sleep activity correlated with clinical manifestations of fibromyalgia, such as longer pain duration. Alpha wave intrusion ДЄlpha wave intrusion occurs when the alpha waves appear with non-REM sleep when delta activity is expected. Practitioners of Transcendental Meditation have demonstrated a one Hertz reduction in alpha wave frequency relative to controls. Mindfulness meditation has been shown to increase alpha wave power in both healthy subjects and patients. However, it is possible that these explanations may be misleading, as they only focus on alpha waves being generated from the occipital lobe. This occurrence is known as alpha wave intrusion. This has been attributed to studies where subjects report non-refreshing sleep and have EEG records reporting high levels of alpha intrusion into sleep. It has long been believed that alpha waves indicate a wakeful period during sleep. It has been suggested that this alpha activity is inversely related to REM sleep pressure. Currently, there are arguments that alpha patterns are a normal part of REM sleep, and for the notion that it indicates a semi-arousal period. The purpose of alpha activity during REM sleep has yet to be fully understood. As opposed to the awake form of alpha activity, this form is located in a frontal-central location in the brain. The second occurrence of alpha wave activity is during REM sleep. The mature alpha wave, at 10 waves per second, is firmly established by age 3. This wave begins appearing at around four months, and is initially a frequency of 4 waves per second. This alpha activity is centered in the occipital lobe, although there has been speculation that it has a thalamic origin. The most widely researched is during the relaxed mental state, where the subject is at rest with eyes closed, but is not tired or asleep. Some researchers posit that there are at least two forms of alpha waves, which may have different functions in the wake-sleep cycle.ДЄlpha waves are present at different stages of the wake-sleep cycle. ДЄn alpha-like variant called a mu wave can be found over the primary motor cortex. Occipital alpha waves during periods of eyes closed are the strongest EEG brain signals.

More recent papers have argued that they inhibit areas of the cortex not in use, or alternatively that they play an active role in network coordination and communication. Historically, they were thought to represent the activity of the visual cortex in an idle state. Alpha waves are reduced with open eyes, drowsiness and sleep. They can be predominantly recorded from the occipital lobes during wakeful relaxation with closed eyes and were the earliest brain rhythm recorded in humans. ДЄlpha waves are one type of brain waves detected by electrophysiological and closely related methods, such as by electroencephalography (EEG) or magnetoencephalography (MEG), and can be quantified using quantitative electroencephalography (qEEG). Historically, they are also called 'Berger's waves' after Hans Berger, who first described them when he invented the EEG in 1924.

Alpha waves, or the alpha rhythm, are neural oscillations in the frequency range of 8вЂ“12 Hz likely originating from the synchronous and coherent ( in phase or constructive) electrical activity of thalamic pacemaker cells in humans.

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