No cognitive processing in the unconscious, anesthetic-like, state of sleep.
The Journal of Comparative Neurology February 1, 2021 Robert P Vertes, Stephanie B Linley 9 citations
We review evidence challenging the hypothesis that memories are processed or consolidated in sleep. We argue that the brain is in an unconscious state in sleep, akin to general anesthesia (GA), and hence is incapable of meaningful cognitive processing-the sole purview of waking consciousness. At minimum, the encoding of memories in sleep would require that waking events are faithfully...