title: [Dissociated ophthalmoplegia of abduction: so-called posterior internuclear ophthalmoplegia in Fisher's syndrome].
abstract: The anterior internuclear ophthalmoplegia, a dissociated ophthalmoplegia of adduction secondary to an ipsilateral supranuclear paresis of the internal rectus, represents a well-know clinical picture. The dissociated ophthalmoplegia of abduction, however, sometimes referred to as posterior internuclear ophthalmoplegia, is debated. Such an oculomotor disturbance emerging from an ophthalmoplegic polyneuropathy (Fisher syndrome) is presented and illustrated by oculographic tracings. A secondary finding was a limited range of accommodation. Oculographically, the dissociated ophthalmoplegia of abduction reflects a true mirror image of the anterior internuclear ophthalmoplegia. Because of anatomical considerations the dissociated ophthalmoplegia of abduction cannot be regarded as internuclear ophthalmoplegia, and the terminology of posterior internuclear ophthalmoplegia is not tenable. Discussing the pathophysiology of the Fisher Syndrome, it is reflected upon an infranuclear lesion causing an ocular motility disorder featuring supranuclear aspects, and avoiding limitations of peripheral nerve damage.
mesh_terms: D000065:Accommodation, Ocular; D000328:Adult; D001259:Ataxia; D004585:Electrooculography; D006801:Humans; D008297:Male; D009886:Ophthalmoplegia / Q000503:physiopathology*; D011115:Polyneuropathies / Q000150:complications* / Q000503:physiopathology; D012438:Saccades; D013577:Syndrome
vernacular_title: Die dissoziierte Ophthalmoplegie de Abduktion: hintere "internukleäre" Ophthalmoplegie im Rahmen eines Fisher-Syndroms.