Beta wave
Beta waves represent a specific section of the spectrum of the brain wave image and occupy a frequency range between 14 and 30 Hertz . The brain wave image (EEG; electroencephalogram ) results from the currents of action of the nerve cells in the cerebral cortex and can be derived with devices commonly used in medicine. For this purpose, lead electrodes are attached to the top of the skull according to an international scheme (usually the 10/20 scheme in clinical routine). The electrodes are connected by wires to an amplifier, which forwards the electrical signals received to a recording device. The occurrence of beta waves has various causes and meanings, for example beta waves occur in around 8% of all people as a normal EEG variant. Beta waves occur in groups frontally and precentrally and can have different meanings. Low amplitude waves are often associated with active focus or anxious tension. Beta waves also arise as a result of the effects of certain psychotropic drugs (e.g. benzodiazepines ) or occur during REM sleep . Physiologically, β oscillations also occur z. B. when constantly tensing a muscle or with active concentration.
See also
Individual evidence
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