A Taghavy

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Event-related P300 potentials are closely reflecting cognitive functions such as stimulus evaluation time (P300 latency) and task relevance (P300 amplitude). Hence, both their potential clinical application for detecting slight cognitive disturbances and an increasing interest in the aging of cognitive human brain functions resulted in a growing number of(More)
We investigated the influence of eye dominance scaled by 6 tests on the parameters (N80, P100 latency and N80-P100 amplitude) of the white-black-, green-black-, red-black- and blue-black-pattern visual evoked potentials (PVEPs) of 40 healthy subjects (20 males and 20 females) with normal visual acuity. The P100 latency of the white-black PVEPs was, for both(More)
The dynamics of cognitive brain functions of 104 patients with both chronic non-cirrhotic (NC) and cirrhotic liver disease (C: C1, non-encephalopathic; C2, encephalopathic) were investigated by means of visual P300 potentials elicited in both the paradigms of transient (PI) and selective attention (PII). Conventional PVEPs, psychometric tests and(More)
Visual event-related P300 potentials, conventional visual evoked potentials, and psychometric tests were applied to patients with noncirrhotic chronic liver disease and to clinically nonencephalopathic and encephalopathic cirrhotics to compare their diagnostic efficacy in detecting early portosystemic encephalopathy (PSE). Sixty-four investigations were(More)
Unilateral internal carotid artery (ICA) stenosis may be accompanied by widespread atherosclerosis of extra- and intracranial vessels leading to subtle cognitive disorders. We applied multichannel recording of P300 in 28 patients (68.3 +/- 8.1 years; 15 asymptomatic, 13 with a history of transient ischemic attack (TIA)) and compared them with an age- and(More)
UNLABELLED We investigated 11 patients (63.1 +/- 10.9 y) after recovery (median: 3 days) from amaurosis fugax of 12.1 +/- 12.0 min duration with the method of pattern reversal visual evoked potentials (PVEPs) derived from Oz to Fz (Cz ground) after randomized monocular stimulation. SELECTION CRITERIA clear-cut cases with no hemispheric symptomatology,(More)
A brain stem infarction in the area of the nerve fascicle of the oculomotor nerve could be demonstrated by NMR to be the cause of a complete oculomotor nerve palsy in a patient with neurosyphilis. A second case presented the very rare finding of an isolated bilateral incomplete oculomotor nerve paresis with external paresis on the right and internal paresis(More)
Over a period of 6 years (1985-1990) we reviewed records of patients with one or more TIAs or PRINDs (196 TIAs, 63 PRINDs). 111 patients (42.9%) suffered from TIAs/PRINDs of the anterior circulation. In all cranial CT scanning (CCT) was performed, whereas only in 79 EEG was recorded after recovery from the symptoms. 25 patients (22.5%) out of the 111 showed(More)
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(More)
For studying the relationship between the PFP300 (Pattern Flash elicited P300) and age we investigated 73 healthy subjects - 34 males, 39 females - between 18 and 60 years of age by presenting randomly two different checkerboards A (16 X 16 caskets visual angle = 50') and B (64 X 64 caskets visual angle = 12.5') to them (A:B = 80:20). The subjects' task was(More)