| 15827015 |
Glasauer S, Strupp M, Kalla R, Buttner U, Brandt T: Effect of 4-aminopyridine on upbeat and downbeat nystagmus elucidates the mechanism of downbeat nystagmus. Ann N Y Acad Sci. 2005 Apr;1039:528-31.
The potassium channel blocker 4-aminopyridine (4-AP) restored vertical smooth pursuit and gaze holding in light in one patient with upbeat (UBN) and in one with downbeat nystagmus (DBN). Without a visible target, however, 4-AP had no effect on UBN, but DBN vanished. We hypothesize that this difference in the effects of 4-AP, which is known to increase the excitability of cerebellar Purkinje cells, can be attributed to the different lesion sites involved in UBN and DBN. |
6(0,0,1,1) |