Disclaimer: It is our belief that these videos are linked to Roger Sperry’s research at Cal Tech. If information becomes available of author or location of these videos please contact Antonio E. Puente at puente@uncw.edu.

These are original videos from studies that Roger Sperry was involved with.

This first video shows the nerve crossing experiments performed in Roger Sperry’s lab:

A series of experiments were performed in order to investigate nerve specificity cutaneous local sign:

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 video shows Case N.G. being presented words exclusively to her right hemisphere. Although she can not name them, she is able to match them with her left hand.

Figure 6 video WJ orign color blocks from SAGE Center: Study of the Mind on Vimeo.



More split brain videos can be found at https://vimeo.com/user24703760/videos.

Early Split Brain Research Gazzaniga

The end is CUT OFF so here’s the rest of the narration:”The question becomes: What happens when you allow both hands together to try and solve the problem? And what we find out is that they fight over each other. One hand knows how to do it and one hand does not. And so they more or less squabble. And the reason for this is that the hemispheres are disconnected. The right hemisphere controls the left hand and the left hemisphere controls the right hand and these are almost mutually independent systems as if two people were fighting over performing the task. One knew how and the other d one would fight for dominance over the situation. What have we gained from this research into split-brains? It is now possible to localize in one half brain, basic mental processes like learning and memory. This cuts the complexities of brain research almost in half so that in the future we can expect to achieve deeper insights into the mechanics of how the brain really works.”

Severed Corpus Callosum

Patient undergoes surgery for epilepsy.

Cerebral Hemispheres

Commissurotomy Studies


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