𝐔𝐧𝐤𝐧𝐨𝐰𝐧 𝐯𝐨𝐢𝐜𝐞𝐬 𝐬𝐩𝐚𝐫𝐤 𝐦𝐨𝐫𝐞 𝐛𝐫𝐚𝐢𝐧 𝐚𝐜𝐭𝐢𝐯𝐢𝐭𝐲 𝐢𝐧 𝐬𝐥𝐞𝐞𝐩 𝐭𝐡𝐚𝐧 𝐟𝐚𝐦𝐢𝐥𝐢𝐚𝐫 𝐨𝐧𝐞𝐬

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By Jason Arunn Murugesu.

The sleeping brain is more active if it hears unfamiliar voices rather than familiar ones. The finding suggests that we can process information about our environments even in the depths of sleep.

Manuel Schabus at the University of Salzburg in Austria and his colleagues monitored 17 people, with an average age of 23, in a sleep lab over two nights. Brain activity was monitored using an electroencephalography (EEG) machine.