Modulation of Motor Cortical Activities by Action Observation and Execution in Patients with Stroke: An MEG Study.

This study was aimed at investigating the effects of action observation and two types of AOE on motor cortical activations after stroke using magnetoencephalography. Twenty patients with stroke and 20 healthy controls were recruited for the collection of data on the beta oscillatory activity in the primary motor cortex (M1). All participants performed the conditions of resting, observation only, and video observation combined with execution (video AOE). Stroke patients performed one additional condition of affected hand observation combined with execution (affected hand AOE). The relative change index of beta oscillations was calculated, and nonparametric tests were used to examine the differences in conditions. In stroke patients, the relative change index of M1 beta oscillatory activity under the video AOE condition was significantly lower than that under the observation only and affected hand AOE conditions. Moreover, M1 cortical activity did not significantly differ under the observation only and affected hand AOE conditions. For healthy controls, the relative change index under the video AOE condition was significantly lower than that under the observation only condition. In addition, no significant differences in relative change indices were found under the observation only and video AOE conditions between the 2 groups. This study provides new insight into the neural mechanisms underlying AOE, which supports the use of observing videos of normal movements during action ...
Source: Neural Plasticity - Category: Neurology Authors: Tags: Neural Plast Source Type: research

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Source: Journal of Clinical Neurology - Category: Neurology Tags: J Clin Neurol Source Type: research
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Source: Neural Plasticity - Category: Neurology Authors: Tags: Neural Plast Source Type: research
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Source: Neural Plasticity - Category: Neurology Authors: Tags: Neural Plast Source Type: research
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Source: Neural Plasticity - Category: Neurology Authors: Tags: Neural Plast Source Type: research
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