The well-known verse of J. V. Foix “It’s when I sleep that I see clearly” illustrate one of the panels in the exhibition Brain(s) at the CCCB, which takes us so deep into the anatomy of the brain as in everything it generates: consciousness, abstract thought, language, imagination, dreams and memory.

During sleep we enter a state of altered consciousness, and although the brain is still active —in fact, activity increases in some areas while we sleep— our perception is greatly reduced.