The Mystery of Human Brain Size

By: Yovan P. Putra

A lot of times we often confuse whether the brain's size has something to do with its ability. As we all know now, the size of the average modern man's brain is smaller than the ancestor's, but our view of the universe (umweld) is much better compared to theirs. Does this mean that size has nothing to do with the brain's ability? Or there's something that we don't know yet about the mystery of human brain.

To find out about this, a recent study by Sandra Witelson, professor of psychiatry and behavioral neuroscience at McMaster University in Ontario, targeted in finding the correlation between brain size and its benefits.

On her study, Witelson asked 100 terminally ill cancer patients to take a series of cognitive test. After each person died, she and her colleagues measured the volume of the subject's cerebral hemispheres. On average, women with larger brains had performed better on verbal tests than women with smaller brains had. There was also a less pronounced association between brain size and visual-spatial ability. The results were equivalent for right-handed and non handed-handed women.

Now, what about men? Did the study come up with the same result? Right-handed men showed similar results for verbal skills, but no correlation registered among nourish-handed men; for lefties and ambidextrous males, brain volume did not predict how well they had done on the language test. Witelson also found that for all men,
overall brain size had no relation to visual-spatial abilities. Yet in on case, she found an exception. In earlier work, Witelson had studied the anatomy of Albert Einstein's brain and showed that although it was of average overall size, the inferior parietal lobes were expanded. These regions are crucial to processing visual imagery.

This study also revealed one interesting findings As men age from 25 to 80, the size of their brain generally decreases, yet age barely alters brain size is women. And yet we still don't know the causes for this thing to happen. Perhaps there are things that meant to be mysterious.

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