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.
For each geological unit, characteristics of shear-wave velocity distribution including histograms of shear-wave velocity and variation of Vs versus depth were calculated and shown. This study reveals that the VÂ¯s(30) of the mountainous zones fall into categories A and B of NEHRP site classification.