Comatose patients show EEG activity related to sound and language processing. That has been known for at least 30 years (a quick search turns up e.g. https://ww

Comatose patients show EEG activity related to sound and language processing. That has been known for at least 30 years (a quick search turns up e.g. https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(95)90252-X.pdf https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736...). The article also speaks about attention. I even quoted that bit.