Downbeat Nystagmus Associated With Dolichoectasia of the Vertebrobasilar Artery

Abstract

Abstract To the Editor. —It is with some interest that we read the article of Jacobson and Corbett.1 While there no doubt exist brain-stem disorders that can result in downbeat nystagmus as was emphasized in the article, it is of note that patient 3 of this article was receiving lithium. It is implied that, because the patient had not had lithium toxicity documented, this was not the cause of downbeat nystagmus. It has been noted, most recently in an article by Halmagyi et al,2 that...