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Critical flicker frequencies in MS patients with normal or abnormal pattern VEP
Author(s) -
Salmi Tapani
Publication year - 1985
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.1985.tb03212.x
Subject(s) - flicker fusion threshold , optic neuritis , audiology , pathological , medicine , flicker , evoked potential , electrodiagnosis , electrophysiology , optic nerve , ophthalmology , pathology , multiple sclerosis , psychiatry , computer science , operating system
– Critical flicker frequencies (CFF) were compared with the latencies of visual pattern reversal evoked potentials (VEP) in 2 groups of MS patients to evaluate the value of CFF in electrophysiological diagnostics of demyelination of the optic tract. A microprocessor‐based device was constructed to obtain CFF thresholds with a 2‐alternative forced‐choice method. VEP latency was more frequently pathological than CFF, but CFF was abnormal in 2 optic neuritis patients with normal VEP. The frequency of pathological CFF and VEP was different in the patient group with a long history of MS compared with the new cases; in the freshly diagnosed group, CFF had a better diagnostic yield compared to the patients with a longer history.