Prediction of Seasickness Susceptibility,
INSTITUTE FOR PERCEPTION RVO-TNO SOESTERBERG (NETHERLANDS)
Pagination or Media Count:
Thirty-nine subjects, suffering from chronic seasickness, and 21 controls have been submitted to several tests in order to find parameters for the prediction of seasickness susceptibility. Routine ENG examination revealed a labyrinthine predominance of more than 30 with caloric irrigation in about 15 of the seasickness susceptibles, suggesting a higher incidence of chronic motion sickness susceptibility in subjects with a labyrinthine imbalance than in normals. Cupulometry revealed identical slopes of the sensation cupulogram for both groups. No difference in slope was found for the nystagmus cupulagmus either. The time constant of the velocity storage mechanism also covered the same range for both groups. Stabilometry performed in a tilting room suggested that seasickness susceptibles are more visually oriented than the controls as revealed by the visually induced postural instability.