Background

The pathology underlying exploding head syndrome, a parasomnia causing a loud sound/sense of explosion, is not well understood. Kappa rhythm is a type of electroencephalogram alpha band activity with maximum potential between contralateral temporal electrodes We report a case of preceding kappa activity before exploding head syndrome attacks.

Case report

A 57-year-old woman complained of explosive sounds for 2 months; a loud sound would transpire every day before sleep onset. She was diagnosed with exploding head syndrome. During polysomnography and the multiple sleep latency test, the exploding head syndrome attacks occurred six times. A kappa wave with activity disappearing a few seconds before most exploding head syndrome attacks was observed. The alpha band power in T3-T4 derivation gradually waxed followed by termination around the attacks.

Conclusion

This case demonstrated that the dynamics of kappa activity precede exploding head syndrome attacks. Finding ways to modulate electroencephalogram oscillation could elucidate their causality and lead to therapeutic intervention.

中文翻译：

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脑电图 kappa 节律波动后无外界刺激的爆炸声：病例报告

背景

爆炸性头部综合征（一种引起响亮声音/爆炸感的异态睡眠）背后的病理学尚不清楚。Kappa 节律是一种脑电图 alpha 波段活动，在对侧颞叶电极之间具有最大电位我们报告了一例在爆炸性头部综合征发作之前的 kappa 活动。

案例报告

57岁女性主诉爆炸声2个月；每天睡觉前都会发出响亮的声音。她被诊断出患有爆炸性头部综合症。在多导睡眠图和多次睡眠潜伏期测试中，爆炸性头部综合征发作发生了六次。在观察到大多数爆炸性头部综合征发作前几秒钟，活动消失的 kappa 波。T3-T4 推导中的 alpha 波段功率逐渐增加，随后在攻击周围终止。

结论

这个案例表明，kappa 活动的动力学先于爆炸性头部综合征发作。寻找调节脑电图振荡的方法可以阐明它们的因果关系并导致治疗干预。