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.
A horizontal rifle is fired at a bullâs-eye. The muzzle speed of the bullet is 670m/s. The barrel is pointed directly. at the center of the bullâs-eye, but the bullet strikes the target 0.026m below the center. What is the horizontal.