For the first question, I honestly have no clue, but regarding botox, as many researchers have shown, botox can cloud the detection of microexpressions, but it doesn't mean it makes it impossible. In the end, microexpressions are a group of actions happening on the face, body, voice and so on, not just something isolated in a particular area. However, there is something interesting about it. Apparently, there was a study done that showed that women who had botox had a harder time reading emotions than their counterparts. The reason for this is basically because, in order to read someone else's emotion accurately, you need to be able to make them too.