Psych M.D. – split brain


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Term: Split Brain
Definition (Myers): A condition in which the two hemispheres of the brain are isolated by cutting the connecting fibers (mainly those of the corpus callosum) between them.
Definition (alternative): Of, relating to, or subjected to surgical separation of the hemispheres of the brain by severing the corpus callosum: split-brain operation to prevent epileptic seizures. *
A brain in which the tracts connecting the two halves of the cerebral cortex have been surgically split or are missing from birth. *
Contextual explanation: The brain is divided into two sections: the right and left hemisphere. The corpus callosum is a large band of neural fibers that connect the two brain hemispheres and carry messages between them. The two hemispheres have different functions and thus perceive & interpret distinct information. We do not have to take the step of utilizing each hemisphere individually because they share information through the corpus callosum. In a split brain, the corpus callosum is disconnected. Some patients go under such surgical procedures to reduce major epileptic seizures. Neurosurgeons, Philip Vogel and Joseph Bogen, observed these seizures being caused by an amplification of abnormal brain activity that reverberates between the two hemispheres.
Related terms and concepts: Corpus Callosum, Retina
Psych M.D. – split brain - The Neuron
Psych M.D. – split brain - The Neuron
Related websites: http://nobelprize.org/educational_games/medicine/split-brain/background.html, http://www.intropsych.com/ch02_human_nervous_system/dual_consciousness_in_split-brain.html, http://www.dls.ym.edu.tw/neuroscience/split.html
Edited by: Susie



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