Many primitive movements, such as swimming or scratching, are rhythmic. An imaging study now suggests that complex discrete movements may simply be a special case of rhythmic movements, in which they are stopped after only one cycle.
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Miall, R., Ivry, R. Moving to a different beat. Nat Neurosci 7, 1025–1026 (2004). https://doi.org/10.1038/nn1004-1025
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DOI: https://doi.org/10.1038/nn1004-1025
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