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Studies Show That Brain Cells Do Not Regenerate But Remain The Same Throughout

tex during the person's life from infancy to adulthood.

The researchers stress that the method has certain limitations. For instance, newly formed nerve cells might remain undetected if they have made up less than one per cent of the total number of nerve cells a person has throughout his or her life. Another possibility, which has been indicated by research on apes, is that new cells can be born, but they are short-lived and die again quickly. The researchers are leaving this possibility open with the reservation that newly formed cells, if they have indeed lived, have not survived any longer than 4.2 months. Moreover, the study rule does not rule out the ability of the cerebral cortex to form new nerve cells after having suffered pathological conditions, such as stroke.

Other studies show that most other tissue types have a renewal cycle of varying lengths. Cells covering the inside of the stomach, for instance, live only a few days; the outer layer of skin is renewed every other week, while the skeleton is thought to be completely renewed once every ten years or so.

Source: EurekAert
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