“So, destroy?" Cal asked. Clearly, the conversation was giving his two brain cells a serious workout.”

They not only obey them; they utilize them as a good engineer would, with maximum efficiency, to carry out the project and bring about the "dream" (as François Jacob put it) of every cell: to become two cells.
Source: Originated from paraphrase of a paragraph in Chance and Necessity (1970, p20) by Jacques Monod:

Source: White Noise (1984)

This is Your Brain on Music (2006)
Context: During the first six months or so of life... the infant brain is unable to clearly distinguish the source of sensory inputs; vision, hearing, and touch meld into a unitary perceptual representation.... inputs from the various sensory receptors may connect to many different parts of the brain, pending pruning that will occur later in life. As Simon Baron-Cohen has described it, with all this sensory cross talk, the infant lives in a state of complete psychodelic splendor (without the aid of drugs).

Gothamist interview (2006)
Context: The biggest challenge in a simul is finding the right shoes! I want to look good in front of fifty people, but really sneakers are the best bet. I try to finish a simul as quickly as possible and don’t worry if I lose a game or two along the way. It becomes a manic workout. I’m literally running around playing moves as fast as my fingers and legs will go. My brain usually follows.
The simul is a great chess illusion. It makes the simul-giver seem like a genius, when really they’re just speaking their language. Chessplayers rely so heavily on instincts developed from years of training and practice. Chess is not all about thinking, there’s a lot of feeling involved.

Source: The Society of Mind (1987), Ch.2
Context: The "laws of thought" depend not only on the property of brain cells, but also on how they are connected. And these connections are established not by the basic, "general" laws of physics... To be sure, "general" laws apply to everything. But, for that very reason, they can rarely explain anything in particular.... Each higher level of description must add to our knowledge about lower levels.

Source: Coriolanus

Variant: I like nonsense, it wakes up the brain cells.

Source: Shadowfever