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.
Iron deficiency anemia can also trigger vertical ridges and changes to your nails that make them concave, or spoon-shaped. Horizontal ridges. Deep horizontal ridges, called Beauâs lines, are often symptoms of a serious condition. They may actually stop nail growth until the underlying condition is treated. Acute kidney disease may also be present if Beauâs lines appear.