Figure 4.

Oculomotor response and spectral analysis. Left: Original recordings of oculomotor response in two patients together with the sine wave stimulus (first column). Right: Corresponding frequency spectra of the oculomotor response and stimulus. The first patient failed to show an oculomotor response, that is, no response during Galvanic labyrinth polarization stimulation. The Glasgow Outcome Score after six months was 1. The second patient showed an oculomotor response to Galvanic labyrinth polarization stimulation: The frequency spectrum reflects the oculomotor response component the stimulus frequecy (0.41 Hz) in synchrony with the Galvanic labyrinth polarization stimulus. This patient survived with an Glasgow Outcome Score of 4.