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.
Medical Definition of HORIZONTAL. 1. : relating to or being a transverse plane or section of the body. 2. : relating to or being transmission (as of a disease) by physical contact or proximity in contrast with inheritanceâcompare vertical.ull Definition of HORIZONTAL. 1. a: of, relating to, or situated near the horizon. 2. â horizontal noun. â horÂ·iÂ·zonÂ·talÂ·iÂ·ty \-Ëzaen-ËzÃ¤n-Ëta-lÉ\ tÄ. â nounÂ·horÂ·iÂ·zonÂ·tal \-ly-Ëzaen-ËzÃ¤n\ tÉl. Ä adverb see horizontal Defined-for english. Language learners see horizontal defined. for kids