Usage Note
Cortex is used in French medicine and neuroscience as in English, most often in cortex cérébral (cerebral cortex). The word is invariable in the plural (les cortex). It is also used in botany to refer to the outer bark of plants, though this technical sense is rare in everyday conversation.
Examples
"Le cortex préfrontal gère la prise de décision."
Natural Translation
The prefrontal cortex manages decision-making.

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