In his view, Trump was 'exhibiting a wide variety of worsening neurological symptoms' that have been creeping into public view for months. He stressed that his comments are observations, not a formal diagnosis, but insisted that what he is seeing is unlikely to be explained simply by Trump's age. 'What does explain it is either neurological problems, post-stroke behaviour or some sort of neurological impairment that is causing this,' he said. 'His age truly does not explain this behaviour.' Donald Trump's 'Neurological Twitch' and Worsening PatternAccording to Garrison, Monday's footage is not an isolated incident.