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. 2021 Mar 24;2021:8890541. doi: 10.1155/2021/8890541

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Copyright © 2021 Elisa De Stefani et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Results of unilateral task at T1. Left %MMA was the Euclidian distance in millimeters between the two lip corner markers expressed as a percentage of the MMA at baseline. All the experimental conditions are represented: smile observation followed by imitation of the same smile movement and ipsilateral hand contraction (SO-HC), smile observation followed by imitation of the same smile movement but without hand contraction (SO), no smile observation but hand contraction (HC), and no smile observation and no hand contraction (BC). Error bars represent SE (standard errors of the means).