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.
horizontal axis noun [S]. âº the âline of âfigures or âcoordinates that are âarranged from âleft to âright along the âbottom of a âgraph or âmap: The âvertical âaxis ârepresents âvalue; the âhorizontal âaxis ârepresents âtime. See also x-axis Compare vertical axis.