The part of the lecture that stuck with me the most was the discussion on the mapping of the word net hierarchy to the cortex of the brain. The fact that the brain has this topographic representation of words and concepts is quite incredible. There are other mappings in the brain too; visual and auditory information is represented in a sort of a hierarchy throughout the cortex. The fact that this also extends to language is even more impressive given that language is evolutionary newer, and therefore less ingrained in the structure of the brain. These findings suggest a sort of innate mapping of the abstract meanings of words that affects how they are perceived and processed. Very interesting bit of research presented there.