What is savant syndrome and how does the brain produce extraordinary abilities?

The answer

Savant syndrome occurs in approximately 1 in 10 autistic individuals and rarely after brain injury. Savants demonstrate extraordinary abilities in specific domains - usually music, art, calendar calculation, mathematics, or memory - while often having significant cognitive disabilities elsewhere. Kim Peek (the inspiration for 'Rain Man') memorized over 12,000 books with 98% accuracy. Stephen Wiltshire draws detailed cityscapes from memory after a single helicopter ride. The leading theory, proposed by Allan Snyder at the University of Sydney, suggests savant abilities result from privileged access to low-level, unprocessed sensory information normally filtered by higher brain functions. Transcranial magnetic stimulation temporarily suppressing the left frontotemporal lobe in typical adults has induced savant-like drawing and proofreading skills, supporting this theory.