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. 2021 Jul 30;11(8):1017. doi: 10.3390/brainsci11081017

Figure A2.

Figure A2

Figure A2

Figure A2

Figure A2

Figure A2

Figure A2

Figure A2

Example frames per facial signal (panel a–l). The first frame shows the starting point of the facial signal, the second frame shows the facial signal, and the third frame shows the endpoint of the facial signal.