07-23-2016, 11:23 AM
Tourette tics are not sudden random seizures. They are fairly consistent tics, a symptom which overlaps with other neurological disorders. The reason that Tourette symptoms wind up being dismissed as "nervous habits" is because they are repeated and fairly predictable. Think of them along the lines of OCD behaviors, or similar repeated motions. The more stressed, the more marked the issues become. Like I said, though, you don't have to have TS for that to happen. I have a few tics and habits that overlap.
She has had several seizure-like episodes over time, and has a history of falls. There's evidence of rapid vision changes, headaches, and so on. This is part of the folly of having most of our candidates be of a certain age range; there are a number of potential culprits, most of them age-related.
As to the idea of her making that particular gesture as a joke, it's possible... just not probable given the entire picture her behavior and health seem to have painted over the past several years.