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. 2019 Dec 12;14(12):e0226328. doi: 10.1371/journal.pone.0226328

Fig 4. EMG envelopes from posed and spontaneous smiles.

Fig 4

A) This shows the processed EMG envelope of self-reported posed smiles during the posed block. This is an example for producer number 37, Independent Component number 1. B) This shows the processed EMG envelope of self-reported spontaneous smiles during the spontaneous block. This is an example for producer 37, Independent Component number 1. The onset and offset speeds and magnitudes of the posed and spontaneous smiles differ significantly.