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Nature 394, 725-726 (20 August 1998) | doi:10.1038/29406;

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Neurobiology: Making smooth moves

In making any movement (say, for instance, reaching for an object) our limbs usually take a smooth trajectory. That has been taken to mean that the body's motor system minimizes jerkiness. Instead, however, smoothness may be a by-product of a more fundamental computational goal of the motor system -- that of balancing speed and accuracy when activity-dependent |[lsquo]|noise' in the neural control systems is taken into account.

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