Cerebral hemisphere From Wikipedia, the free encyclopedia
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The
human brain as viewed from above, showing the cerebral hemispheres. The
anterior aspect (front) of the brain is to the right.
A cerebral hemisphere (hemispherium cerebrale) is defined as one of the two regions of the brain that are delineated by the body's median plane. The brain can thus be described as being divided into left and right cerebral hemispheres. Each of these hemispheres has an outer layer of grey matter called the cerebral cortex that is supported by an inner layer of white matter. The hemispheres are linked by the corpus callosum, a very large bundle of nerve fibers, and also by other smaller commissures, including the anterior commissure, posterior commissure, and hippocampal commissure. These commissures transfer information between the two hemispheres to coordinate localized functions. The architecture, types of cells, types of neurotransmitters and receptor subtypes are all distributed among the two hemispheres in a markedly asymmetric fashion. However, it must be noted that, while some of these hemispheric distribution differences are consistent across human beings, or even across some species, many observable distribution differences vary from individual to individual within a given species.
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Successful therapy is being practiced by way of deliberate rapid eye movement from rt to left and conversely to significantly help alleviate disorders such as many of the symptoms of post traumatic stress disorder. So far there is no certainty as to exactly why the described therapy works, other than that it consciously parallels rapid eye movement (REM) in various stages of sleep. My speculation on this is that the corpus callosum (and its sub components) - as a kind of liaison connecting the two hemispheres - is augmented furthermore when it is stimulated by a deliberate, conscious stimulation while one is awake. This is a relatively new therapeutic method, although, I personally have had - since diagnosed - ptsd, from childhood and exascerbated furthermore by military experiences, I began excercising this method since about age eight - about forty years before it was published in Disorder Symptoms Manuals written between 1980 and the present. I recommend the therapeutic method to anyone who suffers from any number of traumatically induced disorders and other psychoses. Does anyone have anything further to say about this, and, how and why the described therapeutic practice is an aid to improved mental health? Again, I don't know why either, but it definitely does reduce ptsd symptoms such as nightmares, anger and disturbingly intrusive waking thoughts. Best regards, - RP 
Re: Coordination of Rt & Left Cerebral Hemispheres -
02-22-2008, 06:39 AM
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