title: Pattern reversal visual evoked potentials (PVEPs) in transient ischemic attacks (TIAs) and prolonged reversible ischemic neurological deficits (PRINDs) of anterior circulation with normal EEGs and normal cranial CTs.
abstract: Out of 75 patients with TIA or PRIND we selected 9 TIAs and 6 PRINDs with normal EEGs and CCTs, full recovery of neurological function, no history of amaurosis fugax and no findings of visual impairments. PVEPs were derived from 01-02 to Fz and Cz as ground following binocular pattern reversal visual stimuli of 1.9 Hz. Interhemispheric differences of the latencies of P60, N80, P100 and of the amplitudes N80/P100 and P100/N140 were compared with the corresponding parameters of 22 age matched controls. In contrary to the latency differences the interhemispheric difference of the amplitude N80/P100 was highly significantly larger (33.5 +/- 16.0%) in patients than in the control group (12.8 +/- 9.8%) (p < or = .0005). The amplitude P100/N140 behaved the same way (p < or = .025); the amplitude of the affected side being smaller. There were no statistical differences between TIAs and PRINDs and a tendency was seen for normalization of the differences with increasing time distances between the onset of the ischemic attack and the point of time of the recordings.
authors.affiliation: Department of Neurology, University of Erlangen, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Taghavy
authors.forename: H
authors.initials: H
authors.lastname: Hamer
authors.forename: J
authors.initials: J
authors.lastname: Fünfgelder
mesh_terms: D000328:Adult; D000368:Aged; D001921:Brain / Q000000981:diagnostic imaging / Q000502:physiology; D002545:Brain Ischemia / Q000000981:diagnostic imaging / Q000503:physiopathology*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D004569:Electroencephalography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006801:Humans; D002546:Ischemic Attack, Transient / Q000000981:diagnostic imaging / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed