[Eye movement disorders in hereditary degenerative ataxia. Electro-oculographic study of 11 cases].

An electro-oculographic study has been performed in 11 patients affected by hereditary degenerative ataxias (5 Friedreich's ataxias, 4 olivopontocerebellar atrophies and 2 late onset cerebellar ataxias). Electrooculographic records were obtained during saccades, pursuit movements and fixed gaze. Saccadic latency, saccadic speed and morphologic features were studied. In Friedreich's ataxia ocular motility was less accurate than in olivopontocerebellar atrophy and in late onset cerebellar ataxia.