Head impulse testing using video-oculography.
Head impulses are a routine clinical test of semicircular canal function. At the bedside, they are used to detect malfunctioning of the horizontal semicircular canals. So far, 3-D-search-coil recording is required to reliably test anterior and posterior canal function and to determine the gain of the vestibulo-ocular reflex (VOR). Search-coil recording cannot be done at the bedside. Here we tested whether video-oculography (VOG) is suitable to assess VOR gain for individual canals at the bedside. We recorded head impulses in healthy subjects using a mobile high-frame-rate, head-mounted VOG-device and compared the results with those obtained with standard search-coil recording. Our preliminary results indicate that high-frame-rate VOG is a promising tool to measure and quantify individual semicircular canal function not only at the bedside.
Bartl
Klaus
K
Department of Neurology, Ludwig-Maximilians-University, Munich, Germany.
Lehnen
Nadine
N
Kohlbecher
Stefan
S
Schneider
Erich
E
D019416:Head Movements; D006801:Humans; D012027:Reflex, Vestibulo-Ocular; D012665:Semicircular Canals / Q000502:physiology