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.
The Canadian Geodetic Vertical Datum of 2013 A modernized Reference for Heights Height System Unification with GOCE 19-20 February 2013; Noordwijk, Netherlands Marc Veronneau vÃ©ronneau And HuangCanadian Huangcanadian Geodetic, Survey Surveyor General. branchlide 9 of 19 Canadian Geodetic Vertical Datum of 2013 (CGVD2013) Name: Canadian Geodetic Vertical Datum of 2013 Abbreviation: CGVD2013 Type of datum: Gravimetric (geoid) -Vertical datum: 2W 0 = 62,636,856.0 m s 2 Realisation: Geoid model CGG2013 (ITRF2008 and NAD83(CSRS)) Type of height: Orthometric.