收录解读
这篇 Nature Human Behaviour 论文利用罕见的人类中央丘脑直接记录,发现一种此前未报道的 19–45 Hz 状态特异性振荡。该振荡只出现在清醒和 REM 睡眠中,在 NREM 睡眠中消失,因此提供了区分自然意识状态的深部脑电生理信号。
更关键的是,这个振荡不只是粗略区分清醒/睡眠,还能进一步分辨 REM 睡眠微状态,并与快速眼动爆发同步出现。由于 REM 睡眠常伴随 vivid dreaming 和意识体验,这一结果把中央丘脑、眼动爆发、REM 微状态和 conscious access 连接到同一个可测量节律。
它值得收录,因为本库对认知科学和人脑意识机制已有宽放行规则;这篇论文直接提出一个人类中央丘脑的意识状态振荡标记,改变了对丘脑如何参与自然意识状态调控的实证理解,也可能为意识障碍干预和深脑刺激参数设计提供可观测目标。
局限在于该研究仍是直接记录机会下的观察性发现,样本规模和临床植入人群限制了泛化;19–45 Hz 振荡是否具有因果作用、是否能跨更广人群稳定复现、以及能否指导治疗仍需要后续干预实验和独立验证。
原始摘要与中文对照
中文对照翻译
丘脑振荡区分人类自然意识状态。人类自然意识状态被认为受丘脑等深部脑结构调节。然而,关于其在人类中的潜在电生理学知之甚少。在此,我们利用直接记录人类丘脑的难得机会,识别出一种迄今未曾报道的、约19–45赫兹的脑状态特异性振荡。这种振荡仅在快速眼动(REM)睡眠和清醒时出现,而在非快速眼动(non-REM)睡眠时则不存在。19–45赫兹振荡进一步区分了REM睡眠微状态,它与眼球运动爆发同时发生,并且特异性地存在于中央丘脑,该结构被认为与引起全局脑状态转换有关。在中央丘脑中发现区分意识状态的独特振荡特征,为进一步研究丘脑对人类意识状态的贡献以及潜在地改进治疗意识障碍的干预措施开辟了新途径。
原始摘要
Natural states of consciousness are thought to be regulated by deep brain structures such as the thalamus. However, very little is known about the underlying electrophysiology in humans. Here, using a rare opportunity to directly record from the human thalamus, we identify a hitherto-unreported brain-state-specific oscillation of approximately 19–45 Hz. This oscillation is present only during rapid eye movement (REM) sleep and wakefulness, while being absent during non-REM sleep. The 19–45 Hz oscillation further distinguishes REM sleep microstates, co-occurring with bursts of eye movements, and is specific to the central thalamus, a structure implicated in causing global brain state transitions. The discovery of a distinct oscillatory signature in the central thalamus that distinguishes conscious states opens up avenues to further investigate thalamic contributions to states of consciousness in humans and potentially to refine interventions to treat disorders of consciousness.