Friday, February 19, 2010

Little known facts about brain II

Despite growing knowledge about our body still do not under stand, how the brain assign different tasks to its two halves. Research has focused on linking specific areas of brain to certain function. But now the Broca’s method has been replaced by the study of living brain.

The PET technique involves the injection of harmless radio active glucose onto the blood stream. A brain area where the glucose is observed in greater amount indicates an increased activity.

The Doctors are now able to examine impaired brain functions in living patients for example a man who has vision in one eye, though both eyes were healthy can diagnosed with a localized affliction of the right half of the brain. It was also possible to identify the damaged brain area of a man who could not recognize the members of the family.

New technology allows scientists to identify the brain’s main sensory regions, the control area of our movements and other areas that are responsible for vision and speech. Research suggests that each activity correspond not just one zone but to a series of specialized zones, which came in to play when these activities performed.

It has been possible to identify the distinct vision zones that are independently analyze the form color and dimensions of an object and construct a coherent image of it. If any one of the decoding element malfunctions then our perception of an object will be faulty.

As our knowledge grows the mapping of brain is becoming more and more detailed. The fact remains though that each person’s brain is unique. Along side the differences between individuals, there are also differences of sex age etc.

Last but least, women make use of both halves of the brain more often than men, who tend to rely on the left half. Nevertheless, the more we discover about the brain the more we came to appreciate the miracle of human thought. The Planum temporale a small zone associated with language, which is found in both halves of the brain is more develop in the left side in 90% of right hander, but 70% of left hander have an equal development in both sides.


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