[Bilateral internuclear ophthalmoplegia (author's transl)].

A case is reported of a patient with bilateral internuclear ophtalmoplegia which followed a single limited lesion of the two medial longitudinal fasciculi (M.L.F.), with degeneration of the right internal nucleus. The authors feel that the exact localization of this minute lesions, associated with right internal nucleus degeneration, can assist in supplying replies to some unanswered questions concerning the M.L.F. syndrome.