otometrics ICS Impulse USB User Manual page 26

User Guide
Covert Saccades
right
This is an example of head impulse data that exhibits an abnormal vestibular ocular reflex on the side indicated by
the gain response and the catch-up saccades. Looking at the Gain graph the data points are all within the gray range indic-
ating unilateral loss. Note the asymmetry of 56%. The right (abnormal) side is affecting the left (normal) side. The head data
shows well performed head impulses and the eye data shows an inadequate vestibular ocular reflex (A) that does not mir-
ror the head velocities. There are covert catch-up saccades present (B). Catch-up saccades are easier to visualize in the 3D
analysis.
26 Otometrics - ICS Impulse USB