Running Head: Graphomotor Sequence Learning
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چکیده
32 The goal of this study was to characterize the dynamics and functional connectivity of 33 brain networks associated with fast (short-term) learning of handwriting using functional 34 magnetic resonance imaging. Participants (n=12) performed a graphomotor sequence 35 learning task (naïve subjects learning to draw simple, three-stroke Chinese word 36 characters), which focused the learning process on the kinematic aspects of sequence 37 learning instead of on the production of the line segments. Learning of the graphomotor 38 sequence was demonstrated by a progressive improvement in movement smoothness as 39 assessed by normalized jerk scores. Examination of the patterns of regional neural 40 activity and functional connectivity during sequence learning demonstrated that cortical 41 regions, which may support visuomotor mapping components of the task, were active 42 prior to sub-cortical areas that may play a role in encoding and refining the novel 43 sequences. Importantly, differences in the time course of recruitment of basal ganglia 44 and cerebellar networks suggest distinct but integrated roles in the encoding and refining 45 of the handwritten sequences. This implies multiple kinematic representations of 46 graphomotor trajectories may be encoded at various spatio-temporal scales. 47 Graphomotor Sequence Learning
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تاریخ انتشار 2010