| Neuron
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From the Research Front
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| Previous
research had linked physical exertion with higher levels of neuronal
growth factors known as neurotrophins in the spinal cord and skeletal
muscles. In new work, a team of researchers at the University of
California at Los Angeles and the A. I. DuPont Hospital for Children
in Wilmington, Del., tested whether these exercise-related changes
affect the brain’s ability to form new connections. The scientists
gave rats access to a running wheel for periods ranging from zero
to seven days. When they tested cultured cells taken from the animals,
they found that those from the runners grew longer extensions known
as neurites and that there was a direct correlation between how
far the rats ran and how long the neurites became. |
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