knee-jerk reaction. Fig. an automatic or reflex reaction; an immediate reaction made without examining causes or facts. With one of his typical knee-jerk reactions, he said no immediately, citing some moral argument that no one understood. See also: reaction.
What did you see when the patients head was rolled to the opposite side? In horizontal canal BPPV, you should have seen a direction change. When the horizontal nystagmus is geotropic, the BPPV is suspected to be canalithiasis, occurring on the side with the more intense nystagmus.
What is Horizontal Gaze Nystagmus? What is Horizontal Gaze Nystagmus? Kevin: Iâm here with DUI professional, Charlie Smith. Charlie, I get a lot of questions regarding being arrested for a DUI. Usually, prior to arresting you, a law enforcement officer will ask you to stare at a pen, pencil, or a red light that they move from side to side. They call this HGN, horizontal gaze nystagmus.