The following article relates this claim by someone who stayed awake for 11 days:
He also employed a unique raw-food diet. Wright claims that his regimen of salads, avocados, bananas, pineapples, nuts, seeds, carrot juice and herbal tea helped his brain stay awake. He also says that it allowed him to "switch" from one side of his brain to the other when he got tired.
(Whales and dolphins are known to employ similar brain-switching techniques, which allow one part of their brain to rest while the other focuses on breathing and other basic functions.)
Can a raw-food diet allow someone to "switch" from one side of his brain to the other when he gets tired?