The deviation of the eyes induced by vestibular stimuli is defined as the distance in degrees from the mid-position of the eyes to the position to which the eyes return in the fast phase. At an intensive angular stimulus the eyes are found to lead the head and to such an extent that the whole nystagmus beat can be displaced in the direction of the fast phase. The deviation of the eyes in the fast direction seems to be closely related to the deflection of the cupula and subsides exponentially in the postacceleratory period in about the same way as does the speed of the slow component. The eyes, however, reach their mid-position before the nystagmus disappears, indicating that a certain degree of intensity in the stimulus is needed to make the eyes deviate in the direction of the fast phase.

Keywords:
Vestibular system, Angular acceleration, Displacement of nystagmus beat, Nystagmography
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© 1969 S. Karger AG, Basel
1969
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