Spectral and temporal electroencephalography measures reveal distinct neural networks for the acquisition, consolidation, and interlimb transfer of motor skills in healthy young adults

Motor practice results in skill acquisition, an asymptotic process leading to quicker and more accurate movements (Willingham, 1998). Synapses that form de novo and strengthen in the offline period after motor practice make the newly acquired motor skill stable and less susceptible to interference because the skill becomes consolidated into motor memory (Brashers-Krug et al., 1996; Shadmehr and Holcomb, 1997; Dayan and Cohen, 2011). Curiously, unilateral motor practice also improves skill performance in the contralateral non-practiced limb, most likely through synaptic adaptations in the hemisphere ipsilateral to the practiced limb (Hortobagyi et al., 2011; Veldman et al., 2015; Nojima et al., 2012; Lee and Carroll, 2007).

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