Results 91 to 100 of about 527 (127)

Estimation of photoparoxysmal response elicited by half-field visual stimulation

NeuroReport, 2000
We examined photoparoxysmal responses (PPRs) elicited by half-field visual stimulation with deep-red flicker light to determine the neurophysiological features of photosensitive epilepsy (PSE). EEG revealed two types of PPRs. One had the focal spike in the occipital region and the other in the temporo-occipital region at the contralateral hemisphere ...
K, Yasuda, K, Kobayashi, K, Sugita, J, Takanashi, Y, Kohno, H, Iwasa, S, Mine, Y, Nakajima   +7 more
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2. Photoparoxysmal response in patients with migraine and epilepsy

Clinical Neurophysiology, 2014
Objectives 5% of patients with epilepsy and migraines are photosensitive and liable to visually induces seizures. The similarity between intermittent photic stimulation (IPS) that provokes seizures and those provokes minimal discomfort and a headache suggests that the precipitants share a common neural mechanism.
Umang Modi, Paul Hwang
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Electroencephalographic (EEG) Photoparoxysmal Responses Under 5 Years of Age

Journal of Child Neurology, 2015
Electroencephalographic (EEG) photoparoxysmal response has been little investigated in very young patients. We studied 5055 patients aged less than 5 years with no acquired brain damage, who underwent EEG recording. We determined the prevalence and significance of photoparoxysmal response induced by 1 to 20 Hz photic stimulation.
Simona, Binelli, Francesca, Ragona, Laura, Canafoglia, Elena, Freri, Veronica, Saletti, Marina, Casazza, Isabella, Gilioli, Stefano, D'Arrigo, Elisa, Visani, Ferruccio, Panzica, Tiziana, Granata, Daria, Riva, Silvana, Franceschetti   +12 more
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Significance of Spontaneous Epileptiform Abnormalities Associated With a Photoparoxysmal Response

Neurology, 1995
Spontaneous epileptiform abnormalities (SEAs) are reported to occur in up to 65% of patients with a photoparoxysmal response (PPR). Although the PPR is usually assumed to indicate primary generalized epilepsy, the clinical significance of associated SEAs is not known.
F G, Gilliam, K H, Chiappa
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Photoparoxysmal EEG response and genetic dissection of juvenile myoclonic epilepsy

Epilepsy & Behavior, 2013
Heritable EEG traits are often associated with epilepsy, and photoparoxysmal EEG response (PPR) is the most notable example of this observation in JME. Such EEG traits may be a subclinical expression of the defective mechanism that leads to epilepsy. Therefore, these traits can be used to map epilepsy genes by dissecting the complex epilepsy phenotype ...
Bobby P C, Koeleman, Carolien G F, de Kovel, Dorothée G A, Kasteleijn-Nolst Trenité   +2 more
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Acute effect of transcranial direct current stimulation on photoparoxysmal response

Epilepsy Research
Transcranial direct current stimulation (tDCS) is a non-invasive technique, used to modify the excitability of the central nervous system. The main mechanism of tDCS is to change the excitability by subthreshold modulation by affecting neuronal membrane potentials in the direction of depolarization or repolarization. tDCS was previously investigated as
Tülay, Yılmaz Erol, İrem, İlgezdi Kaya, Emel, Ur Özçelik, Serkan, Aksu, Nermin Görkem, Şirin, Nerses, Bebek, Adnan, Kurt, Sacit, Karamürsel, Betül, Baykan   +8 more
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Photoparoxysmal Responses Revisited

Journal of Clinical Neurophysiology, 1988
Prasanna Jayakar, Keith H. Chiappa
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Photoparoxysmal response on eye closure in photosensitive patients.

Acta neurologica, 1993
The Authors studied the presence of photoparoxysmal response (PPR) during intermittent photic stimulation (IPS) in 2,888 consecutive EEG recordings. PPR was present in 2.3% of EEGs and 10% of all patients referred to EEG laboratory for epilepsy (45 patients, 18 males, 27 females (M:F ratio 1:1.5), mean age 12 yrs).
F A, de Falco, R, Roberti, C, Florio, G, Franzese   +3 more
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The Photoparoxysmal Response: The Probable Cause of Attacks during Video Games

Clinical EEG and Neuroscience, 2008
Photic stimulation is part of a typical EEG in most countries, especially to check on the photoparoxysmal response (PPR). Interest in this response was enhanced in 1997 when hundreds of Japanese children had attacks while viewing a TV cartoon called “Pokemon.” The overall prevalence of the PPR among patients requiring an EEG is approximately 0.8%, but
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Photoparoxysmal Response in Children with Absence Epilepsy

2006
Studija javljanja fotoparoksizmalnog odgovora u 30 djece u dobi 3-16 godina od koji 19 ima napade tipa jednostavnog, a 11 tipa složenog absencea.
Bašnec Brkić, Anica, Barišić, Nina
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