Dr. V.S. Ramachandran is a well-known neurologist. He is currently the Director of the Center for Brain and Cognition, as well as a professor in the Psychology Department and Neurosciences Program at the University of California, San Diego.
Ramachandran is best known for his work on neurological conditions such as phantom limbs, autism, neglect, his invention of the mirror box (a tool used to alleviate suffering from those who suffer from phantom limbs), and his more recent work on synesthesia.
For more on the work of V.S. Ramachandran I recommend his video lecture at TED.com and his article printed in Scientific America about synesthesia, entitled “Hearing Colors, Tasting Shapes.” (PDF file)