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Slow alpha variant: a report of a 3 for 1 ratio subharmonic.

机译:慢速阿尔法变体:3比1谐波的报告。

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摘要

As a group, unusual electroencephalogram (EEG) patterns are often seen and make interpretation more difficult. Some are not understood on the basis of physiology and clinical implication. For others, no pathological substrate or epileptic condition explains these patterns.Background activity refers to the EEG rhythm corresponding to the patient's age and state of consciousness. The alpha rhythm is in the range of 8 to 12 Hertz (Hz), has a sinusoidal waveform, blocks with eye opening and alertness and is usually pronounced in posterior regions.In 1947, Goodwin first called attention to a slow alpha variant rhythm, which predominates in the occipital and adjacent posterior areas. Ten percent of normal subjects' EEG contained alpha variant rhythm. Another source reported it in 0.8% of asymptomatic people. When it has once been observed, it may be expected to reappear more or less regularly in EEG recordings.
机译:作为一个小组,通常会看到异常的脑电图(EEG)模式,这使解释更加困难。根据生理学和临床意义尚不了解其中一些。对于其他人,没有病理学上的原因或癫痫病的病因可以解释这些模式。背景活动是指与患者年龄和意识状态相对应的脑电图节律。阿尔法节奏在8到12赫兹(Hz)的范围内,具有正弦波形,具有开眼和警觉的障碍,通常在后部区域明显。1947年,古德温首先提请注意慢速阿尔法变奏节奏,在枕骨和邻近的后部区域居多。正常受试者的脑电图的百分之十包含阿尔法变异节奏。另一个消息来源报道无症状人群中有0.8%患有这种疾病。一旦被观察到,它可能会或多或少地定期出现在EEG录音中。

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