Table 3. Distribution in frequency of alterations in vestibular exam in 30 patients with Friedreich's ataxia.
| ALTERED EXAMS | FRIEDREICH'S ATAXIA | |
|---|---|---|
| N | % | |
| Bilateral labyrinthine hyporeflexia | 16 | 53.3 |
| Multiple semi-spontaneous nystagmus | 12 | 40.0 |
| Absent rotary nystagmus | 11 | 36.7 |
| Asymmetrical optokinetic nystagmus | 10 | 33.4 |
| Spontaneous nystagmus | 6 | 20.0 |
| Pendulum tracking alterations | 5 | 16.7 |
| Bilateral labyrinthine hyperreflexia | 5 | 16.7 |
| Bidirectional semi-spontaneous nystagmus | 2 | 6.7 |
| Unidirectional semi-spontaneous nystagmus | 1 | 3.4 |
| Unilateral labyrinthine hyperreflexia | 1 | 3.4 |
Abbreviations: %, frequency; N, number of patients.