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Electronystagmography findings in spinocerebellar ataxia type 3 (SCA3) and type 2 (SCA2)
Bianca Simone Zeigelboim1, Hélio A G Teive, Rosane Sampaio
1Otoneurology Unit, MSc and PhD Program in Communication Disorders, Tuiuti University of Paraná, Curitiba, PR, Brazil. bianca.zeigelboim@utp.br
Objective:
To describe the alterations observed in electronystagmography (ENG) of patients with spinocerebellar ataxia (SCA) types 2 and 3.
Method:
Sixteen patients were studied and the following procedures were carried out: anamnesis, otorhinolaryngological and vestibular evaluations.
Results:
The clinical findings in the entire group of patients were: gait disturbances (93.75%), dysarthria (43.75%), headache (43.75%), dizziness (37.50%) and dysphagia (37.50%). In the vestibular exam, the rotatory (62.50%) and caloric (75%) tests were among those which presented the largest indexes of abnormalities; the presence of alterations in the exams was 87.50%, with a predominance of central vestibular disorders in 68.75% of the exams.
Conclusion:
Vestibular exams could be an auxiliary tool to investigate SCAs, besides a precise clinical approach and, particularly, molecular genetic tests.
