[Electronystagmographic evaluation of changes in vestibular reactions after administration of diverse substances into cerebral ventricles].

Vestibulo-oculomotor reflexes (nystagmus) were recorded by the method of electronystagmography in 33 neurosurgical patients before and after ventriculography. Cerebral ventricles were examined using water soluble compounds (conray, dimeriks, amipaque) in 18 patients or water soluble compounds combined with majodil emulsion in 15 patients. Ventriculography by means of water soluble compounds led to insignificant changes in nystagmic parameters while that by means of X-ray contrasting mixtures caused a frequent and noticeable enhancement of stem vestibular reactions as related to all nystagmic parameters and a significant increase of vestibulo-autonomic reactions.