Benign positional vertigo produces a specific pattern of abnormalities with high frequency vestibulo-ocular reflex testing.
The vestibulo-ocular reflex was studied at high frequencies of active head rotation (2 to 6 Hz) in twenty-three patients with benign positional vertigo (BPPV). Gain and phase measurements were obtained in the vertical and horizontal planes, and the results were compared to those of a control group consisting of 19 asymptomatic age-matched subjects. In the horizontal plane, the phase lead was significantly smaller in patients with BPPV as compared to controls (p < 0.01 at all frequencies). Vertical results did not differ from normals. These findings challenge "cupulolithiasis" as an explanation of the mechanism of BPPV's symptoms.
Corvera-Behar
G
G
Hospital General Dr. Manuel Gea González, Mexico City.
Corvera
J
J
Hernandez
L M
LM
D000328:Adult; D000368:Aged; D007758:Ear, Inner / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D008575:Meniere Disease / Q000503:physiopathology / Q000601:surgery*; D008875:Middle Aged; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D014725:Vestibular Nerve / Q000503:physiopathology / Q000601:surgery*