What I recognized as “brain shocks” when I was taking generic escitalipram (Lexapro) would be a feeling sort of like a short circuit in my brain for a quick flash of a moment. Like another commenter said, quick movements of my eyes or head could cause it. It was quick, and non lingering, but could happen frequently. Just a little bzzt! In the brain with a little visual stutter. It didn’t hurt but it was disconcerting until I realized it was normal when missing or cutting down doses. Sounds like it can happen for some people on the normal dose but that wasn’t an issue for me.