By Billy Hammond (Copyright AELS)

March 26,2022

Absence Seizures

In my years of teaching the martial arts and English, there have been a few times when I’ve noticed children of elementary school age, “zone out”. Usually it occurs after they’ve been very active and have been hyperventilating to re-oxygenate. They suddenly stop what they’re doing and pause for several seconds before resuming what they’re doing.

When I studied neurology, I learned that these pauses of activity are called “absence seizures” and that they usually last less than 10 seconds. Hyperventilation seems to precipitate them. EEGs often show a spike and wave activity at a frequency of 3 Hz.* They usually occur in children 4-8 years old and two-thirds resolve before adulthood. They are usually treated with Ethosuximide and valproic acid in the US when treatment is deemed necessary.

*Gelb, Douglas J. MD. Introduction to Clinical Neurology, Ch 5: Seizures, E. Electroencephalograpy , Oxford University Press. Kindle Edition.

アブサンス発作(欠神発作)

武術や英語を教えている中、まれに小学校低学年の子供が突然立ち止まってぼっとした顔になるケースを見てきた。激しい運動の後で過呼吸状態に伴う関連があるように気付いた。数秒間に『意識がない』ように見える。

神経学を勉強した時にこの活動の停止は『アブサンス発作』と呼ばれていると学んだ。通常、10秒以下続く。過呼吸が先行するそうだ。EEG(脳波図)には3Hzの棘徐波複合が見られることが多いい。*48歳の子には最も多く、成人するまでに大半(2/3)が自然解決する。

*参考:Gelb, Douglas J. MD. Introduction to Clinical Neurology, Ch 5: Seizures, E. Electroencephalograpy , Oxford University Press. Kindle Edition.

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