Neural substrates of graphomotor sequence learning: a combined FMRI and kinematic study.

Abstract:

:The goal of this study was to characterize the dynamics and functional connectivity of brain networks associated with fast (short-term) learning of handwriting using functional magnetic resonance imaging. Participants (n = 12) performed a graphomotor sequence learning task (naïve subjects learning to draw simple, 3-stroke Chinese word characters), which focused the learning process on the kinematic aspects of sequence learning instead of on the production of the line segments. Learning of the graphomotor sequence was demonstrated by a progressive improvement in movement smoothness as assessed by normalized jerk scores. Examination of the patterns of regional neural activity and functional connectivity during sequence learning demonstrated that cortical regions, which may support visuomotor mapping components of the task, were active prior to subcortical areas that may play a role in encoding and refining the novel sequences. Importantly, differences in the time course of recruitment of basal ganglia and cerebellar networks suggest distinct but integrated roles in the encoding and refining of the handwritten sequences. This implies multiple kinematic representations of graphomotor trajectories may be encoded at various spatiotemporal scales.

journal_name

J Neurophysiol

authors

Swett BA,Contreras-Vidal JL,Birn R,Braun A

doi

10.1152/jn.00449.2009

subject

Has Abstract

pub_date

2010-06-01 00:00:00

pages

3366-77

issue

6

eissn

0022-3077

issn

1522-1598

pii

jn.00449.2009

journal_volume

103

pub_type

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