The Human Brain Essay

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Our brains weigh about three pounds and are divided into two similar looking but functionally different hemisphere, the right hemisphere and the left hemisphere. Both of which are connected by a large bundle of nerves called the corpus collosum. In some people with severe seizure disorders such as epilepsy, it was found that if this bundle of nerves was severed their seizure would either cease or a the very least be better controlled. From this surgical procedure it was discovered that the two hemispheres had different methods of processing information, as well as controlling parts of the body. The left hemisphere controls the right have of the body and the right hemisphere controls the left side. While we rely on both hemispheres to…show more content…
Interestingly enough, the centers for speech interpretation and production are located in the left hemisphere. If the patient is blindfolded and a familiar object, such as a toothbrush, is placed in his left hand he appears to know what it is; for example by make the gesture of brushing his teeth. If asked by the experimenter to name the object he can not. When asked what he is doing with the object, gesturing a brushing motion, he has know idea. If the left hand gives the toothbrush to the right hand, the patient will immediately say "toothbrush." Cutting apart the two hemispheres of the human brain is a drastic step, and is one of the most controversial operations ever performed. Controversy stems not from the risk to life the procedure involves. It stems from a Jekyll and Hyde aura surrounding the side effects-the"Split-Brain" syndrome. They orchestrate into a single personality if-and only if-the cerebral hemispheres communicate. Thus, many neurosurgeons have been reluctant to try the split-brain operation for fear of severing all vital communications. However, there may now be a way to avoid the Jekyll-Hyde effect. A new form of the surgery devised by P.J. Vogel called anterior cerebral commissurotomy eliminates the Jekyll-Hyde effect. The procedure involves; opening the skull, laying back the brains coverings, then using a tool called a cerebral retractor to expose the corpus callosum. The front three-fourths of the corpus callosum are
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