Treatment with 4-aminopyridine improves upper limb tremor of a patient with multiple sclerosis: a video case report. Schniepp R, Jakl V, Wuehr M, Havla J, Kümpfel T, Dieterich M, Strupp M, Jahn K Mult Scler. 2012 Oct 15. PMID: 23069878. Abstract CommentRecommendBookmarkWatch