Single fiber EMG in multiple sclerosis.
A group of 25 patients with sclerosis multiplex (SM) was examined by means of single fiber (SF) EMG. This group had the mean value of jitter 55.0 +/- 4.5 microseconds and fiber density (FD) 2.15 +/- 0.12. The findings of the patients with the first attack of illness and the findings of the patients with twenty-year duration are the same. A hypothesis is suggested that not only the peripheral neuron but also the CNS structures take part in the increase of jitter. The different results of stimulated single fiber (SSF) and SF EMG are discussed; the former reflects only the peripheral part of the nervous system due to peripheral stimulation. The higher levels of CNS cannot take part in it.
Laboratory of Clinical Neurophysiology, Faculty Hospital, Olomouc, Czechoslovakia.
J
J
Bartousek
O
O
Grenarová
M
M
Beranová
P
P
Hlustík
D000293:Adolescent; D000328:Adult; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000473:pathology / Q000503:physiopathology*; D009132:Muscles / Q000473:pathology / Q000503:physiopathology*