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What is Dr. Wilder Penfield known for?

  1. Pioneering brain surgery

  2. Inventing the first cardiac pacemaker

  3. Inventing the Canadarm

  4. Founding Research in Motion

The correct answer is: Pioneering brain surgery

Dr. Wilder Penfield is known for pioneering brain surgery, more specifically his work on mapping out the different functions of the brain through electrical stimulation of the cerebral cortex. This revolutionary technique helped lay the foundation for modern neurosurgery. Option B is incorrect because the first cardiac pacemaker was actually invented by American engineer Wilson Greatbatch in 1956. Option C is incorrect because the Canadarm was actually invented by a team of engineers at the National Research Council of Canada. Option D is incorrect because Research in Motion was founded by Mike Lazaridis and Douglas Fregin, not Dr. Penfield.