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Behavioural and neural plasticity of ocular motor control: changes in performance and fMRI activity following antisaccade training

By Sharna eJamadar, Sharna eJamadar, Beth P Johnson, Meaghan eClough, Gary F Egan, Gary F Egan and Joanne eFielding and Joanne eFielding


The antisaccade task provides a model paradigm that sets the inhibition of a reflexively driven behaviour against the volitional control of a goal-directed behaviour. The stability and adaptability of antisaccade performance was investigated in 23 neurologically healthy individuals. Behaviour and brain function were measured using functional magnetic resonance imaging (fMRI) prior to and immediately following two weeks of daily antisaccade training. Participants performed antisaccade trials faster with no change in directional error rate following two weeks of training; however this increased speed came at the cost of the spatial accuracy of the saccade (gain) which became more hypometric following training. Training on the antisaccade task resulted in increases in fMRI activity in the fronto-basal ganglia-parietal-cerebellar ocular motor network. Following training, antisaccade latency was positively associated with fMRI activity in the frontal and supplementary eye fields, anterior cingulate and intraparietal sulcus; antisaccade gain was negatively associated with fMRI activity in supplementary eye fields, anterior cingulate, intraparietal sulcus and cerebellar vermis. In sum, the results suggest that following training, larger antisaccade latency is associated with larger activity in fronto-parietal-cerebellar ocular motor regions, and smaller antisaccade gain is associated with larger activity in fronto-parietal ocular motor regions

Topics: fMRI, motor control, antisaccade, training-induced changes, ocular motor training, ocular motor network
Publisher: Frontiers Media S.A.
Year: 2015
DOI identifier: 10.3389/fnhum.2015.00653
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