Abstract

SOCARRAS HERNANDEZ, Bárbaro et al. Exploration of vertical semicircular ducts with induced rotatory stimulation. Rev Cub Med Mil [online]. 2018, vol.47, n.1, pp.73-79. ISSN 0138-6557.

Rotatory tests have been used for over a century for the study of vestibular function because it is a very effective physiological controlled stimulus on the posterior labyrinth, usually the horizontal semicircular ducts that are explored, since they are affected more frequently and are more easy to study, however sometimes the injured are vertical and therefore other alternatives must be used to arrive at a correct diagnosis. The aim of this study is to evaluate the range of physiological function of vertical semicircular ducts using electronystagmography and rotary stimulation. The method used was the technique of time - speed stimulation, with successive phases of acceleration, constant speed, deceleration and abrupt stop, with a computerized rotating chair. Vestibulo-ocular arreflexia of the right anterior vertical channel. It was shown that at speeds lower than 1 Hz it is possible to evaluate the Ocular Lobe Reflex in the vertical semicircular ducts, although the frequency of the stimulus is below the level at which this reflex works in daily activities.

Keywords : vestibular system; electronystagmography; rotatory test; vestibulo-ocular reflex; nystagmus.

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