Motion Intolerance Research Articles

Vestibular and postural findings in the motion sickness syndrome

The motion sickness syndrome constitutes varying degrees of subjective motion intolerance and three objective findings: hyperactive VOR (79%), hip sway strategy (60%), and positional nystagmus (42%). It is present in subjects who have a strong history of motion sickness. Vestibular rehabilitation appears to help control symptoms. The study also suggests an inheritance pattern, but a structured pedigree could not be constructed. Prospective studies are warranted to further establish the patterns of the motion sickness syndrome.

Vascular loop as a cause of vertigo.

A vascular loop in the internal auditory canal pressing upon the vestibular nerve was found in a series of eight patients with episodic vertigo and severe motion intolerance. All patients had failed medical and surgical therapy for vestibular Meniere's disease, which this syndrome closely mimics. A vestibular nerve resection or section medial to the vascular loop produced relief of symptoms in all patients, but one patient required a second operation. We have no test or study to reliably diagnose this syndrome preoperatively. The history appears to be the best indicator to date.