Single fiber EMG in cerebrovascular stroke (CVS).

This paper gives previously unpublished data about fiber density (FD) and jitter in patients with CVS. The cluster of these values is very similar to that found in sclerosis multiplex (SM). There is a problem whether both clusters represents the same disorder of CNS compared with amyotrophic lateral sclerosis (ALS) or spinal muscular atrophy which have different values. Another problem is the participation of presumed central lesion on the increased jitter, the mechanism of which is still unknown.