Influence of Spontaneous Nystagmus with Eyes Closed on Computerized Vestibular Exam of Patients with Chronic Peripheral

Abstract

SUMMARY Introduction:The spontaneous nystagmus with eyes closed (NEOF) can modify the results obtained during some evidence of vestibular, leading to erroneous conclusions. Objective:To characterize the patients and the type of influence on the evidence of NEOF vectonystagmography digital. Method:Retrospective study based on survey charts of patients with the presence of NEOF vectonystagmography digital, in the Outpatient Equilibriometria UNIFESP-EPM, in the years 2000 to 2007. Comparisons were made between genders, ages, direction, angular velocity of NEOF, completion of entrance examination and its influence on the results of caloric testing. Results:We found 73.7% of the population was female, mean age of 55.08 years; NEOF prevalence of horizontal and angular velocity smaller than 7 o /s in 86.7%. 59% had some kind of influence caused by the caloric test NEOF as inversion, hyporeflexia, hyperreflexia, nystagmus directional preponderance (NDP) and labyrinthine preponderance (LP) changed. The most prevalent findings were normal vestibular tests (EVN) and bilateral irritative peripheral vestibular syndrome (BIPVS). 38.7% caloric ice and realized these cases it was possible to reach a conclusion in 79%. Conclusion:The NEOF most common was the horizontal type, with VACL less than 7

Avaliação oculomotora em adultos: um estudo do efeito da idade e de alterações visuais

“…Regarding the direction of the nystagmus, a previous study (13) has found that there was a predominance of horizontal nystagmus, present in four of the five participants, which also occurred in this study (13) . With the aim of assessing the influence of SNEC in other VENG tests in patients with chronic peripheral vestibulopathy, a national study also observed that the presence of SNEC was prevalent in the horizontal direction (15) . Of the seven patients with SNEC, five (71.42%) had horizontal nystagmus to the left and two (28.58%) to the right, which are results that differ from previous studies (13,15) .…”

“…With the aim of assessing the influence of SNEC in other VENG tests in patients with chronic peripheral vestibulopathy, a national study also observed that the presence of SNEC was prevalent in the horizontal direction (15) . Of the seven patients with SNEC, five (71.42%) had horizontal nystagmus to the left and two (28.58%) to the right, which are results that differ from previous studies (13,15) . One of these studies (13) verified the presence of SNEC in five of the participants, four of whom had horizontal nystagmus to the right (80%), while the fifth participant (20%) had an oblique nystagmus to the right and upward.…”