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n. A plural of cortex.

n. Plural form of cortex.

n. Plural of cortex.

"Research shows that when most of us fall asleep, the brain network that involves attention to the outside world (the working memory network consisting primarily of the lateral frontal and parietal cortices) deactivates and our default brain network (medial prefrontal and posterior cingulate cortices) takes over."

cortexes