Scott Adams (of Dilbert fame - the dream of many an engineer to throw off the yoke of the corporate world and write comics for a living) came down with a really exotic condition 18 months ago that caused him to lose his speech only when speaking one-on-one. His speech was fine speaking in a large group (thousands) or by himself. But when he spoke one-on-one, he could only manage a hoarse whisper. This was a permanent condition.

The other day he fixed his brain by speaking rhyme. Not only was he able to say the rhyme using a normal voice, it rewired his brain to now allow him to speak normally!

An excellent example of how really odd and complex the human brain is.

- via BoingBoing