The research of a test in which a research subject was asked to draw a picture of a
dog four times, at different stages of his exposure to transcranial magnetic stimulation.
 
 

 

Found this interesting links while reading The Singularity is Near from Ray Kurzweil:
 
Savant for a day (https://wireheading.com/brainstim/savant.html)
Shows that maybe Savant syndrome can be induced.
 
TMS: Twilight Zone Science (https://www.wired.com/medtech/health/news/2002/04/51699)
A bit more detailed than the above, but still worth the reading.

“The technology at the core of professor Allan Snyder’s experiments to boost creative intelligence,transcranial magnetic stimulation, is behind some pretty wacky claims. Subjects in experiments byDr. Michael Persinger, of Laurentian University, believe they felt the presence of God, or some similar mystical experience.” – www.wired.com 04.18.02

 

 
Added that to some searches and found these below. I find the combined knowledge to be mind blowing 🙂
 
 
Jason Padgett – Brutal Attack results in Savant Syndrome
 

 

NOTE BELOW / ADDENDUM 2018.11
While reading Moonwalking with Einstein: The Art and Science of Remembering Everything by Joshua Foer, I discovered that Daniel Tammet is more of a high-tech fraud than a Savant.  It’s hard to explain, but proof comes from his own web-site in 2001.  Where he states: 

“My own interest in memory and conversely Memory sport was sparked by my casual acquaintance with a children’s book on broad memory concepts for better exam performance at the age of 15. The following year I passed my GCSEs with some of the year’s best results and subsequently performed well at A-level, mastering French and German along the way with the help of these tried-and-tested techniques.Following teaching stints in Scandinavia and as a volunteer lecturer of English in Eastern Europe, I competed for the first time at the World Memory Championships in London in 1999, managing 12th place overall.”

It’s weird and enlighthing that his mental prowesses is more interessing as an accident than as an hard work achievement.
Full link to his web-site on archive.org.

END NOTE
 
Daniel Tammet – The Boy With The Incredible Brain