During REM sleep, the dorsal lateral prefrontal cortex shows decreased activity, suggesting suppression of logical thinking and decision-making.

“another part of the brain bucked the trend of increased activation during REM sleep that part of the brain with a far left and right sides of your frontal lobe something that we call the dorsal lateral prefrontal cortex terrible mouthful of word salad essentially just means the far left and right sides of your prefrontal cortex those are very important for logical rational thinking and decision making those parts of the brain went down in their activity almost as though they were suppressed during REM sleep dreaming”