Analysis of nystagmus response to pseudorandom velocity input.
This report describes a method to analyse the vestibular system when subjected to a pseudorandom angular velocity input. A sum of sinusoids (pseudorandom) input lends itself to analysis by linear frequency methods. Resultant horizontal ocular movements were digitized, filtered and transformed into the frequency domain. Programs were developed and evaluated to obtain the auto spectra of input stimulus and resultant ocular response, cross spectra, the estimated vestibular-ocular system transfer function gain and phase, and coherence function between stimulus and response functions.
D003201:Computers; D006801:Humans; D009041:Motion Sickness / Q000209:etiology; D009760:Nystagmus, Physiologic; D012984:Software; D013026:Space Flight; D014722:Vestibule, Labyrinth / Q000502:physiology*