Developmental trajectory of neural activity underlying motor control differs by sequence complexity and motor stage.

Follow-up correlations in each region showed that the relationship between age and beta activity during the planning phase was only significant in the PCC ( r = −0.28, p = .025), although it approached significance in the cerebellum ( r = −0.19, p = .14) and occipital gyrus ( r = −0.24, p = .064).

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In both clusters, planning-related beta activity showed a trend towards becoming weaker with age in the complex condition, although the simple slopes were not significant in either condition.

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