Electronystagmography in Amyotrophic Lateral Sclerosis

To the Editor. —We are glad that several authors 1-4 have recently reported eye-movement disorders in patients with amyotrophic lateral sclerosis (ALS), modifying the classic teaching that oculorotary functions are spared in ALS. It is possible that our 1974 report has not been cited because it appeared in The Laryngoscope , 5 although presentation was made at the Eighth International Congress of Electroencephalography and Clinical Neurophysiology in 1973 6 and the study was mentioned later in a neurology review. 7 Briefly, electronystagmography (ENG) was applied to patients with several motor neuron diseases (MND) (mainly, of course, ALS). The analysis by 1973 5,6 included 88 patients with MND, 66 of whom we considered to suffer from classic ALS. About two thirds underwent neurologic reevaluation after three months, and fewer after 12 and 24 months, so that the original diagnoses could be reviewed and the clinical courses assessed under our personal observation. There