These are original videos from some of the studies Dr. Sperry was involved with.

This first video shows the nerve crossing experiments that Roger Sperry performed.

The next video is of Dr. Sperry’s son, Glenn Michael Sperry, accepting the National Medal of Science and Technology on his father’s behalf from President George H.W. Bush in 1989 for his work on Neurospecificity.

The next video shows a series of experiments investigating nerve specificity cutaneous local sign.

The next video is of Dr. Sperry’s Nobel Lecture. Dr. Sperry was unable to attend the lecture due to illness, so his lecture was read by Dr. David Ottoson.


The following two links display videos recorded by Baron Wolman of split-brain patients being tested by Michael S. Gazzaniga PhD, one of Roger Sperry’s students. The first video shows Case W.J., attempting to put together four colored blocks, first with individual hands, then with both simultaneously. The second shows Case N.G. being presented words exclusively to her right hemisphere. Even though she can not name them, she is able to match them with her left hand.



More split brain videos can be found at

A short documentary on Dr. Roger Sperry


Experiments interpreting left and right cerebral hemispheres of the brain


Commisurotomy studies film clips


Dr. Roger Sperry receives Award of Medicine


Interview of Michael Gazzaniga in Roger W. Sperry’s lab explains experiments done by Sperry and Gazzaniga to test Roger W. Sperry’s Split Brain theory.