Results 1 to 10 of about 488 (100)

Photoparoxysmal responses [PDF]

Arquivos de Neuro-Psiquiatria, 1990
Sixty-five outpatients with photoparoxysmal response (PPR) during routine EEG were studied. The PPR showed prevalence in women (75.4%). Seizures were found in 66.1% of cases. The rest recordings were abnormal in 41.8% with prevalence of generalized paroxysm. Eight patterns of PPR were observed, being polyspike mixed to slow wave the most frequent (53%).
Muszkat, Mauro, Guimarães, Rosana M., Silva, Ademir B. da, Campos, Carlos J. Reis de   +3 more
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Interrater agreement of classification of photoparoxysmal electroencephalographic response [PDF]

Epilepsia, 2020
AbstractOur goal was to assess the interrater agreement (IRA) of photoparoxysmal response (PPR) using the classification proposed by a task force of the International League Against Epilepsy (ILAE), and a simplified classification system proposed by our group.
Sándor Beniczky, Harald Aurlien, Silvana Franceschetti, Antonio Martins da Silva, Francesca Bisulli, Carla Bentes, Laura Canafoglia, Lorenzo Ferri, David Krýsl, Ana Rita Peralta, Attila Rácz, J. Helen Cross, Alexis Arzimanoglou   +12 more
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Genetics of Photosensitivity (Photoparoxysmal Response): A Review [PDF]

Epilepsia, 2004
Summary: We present a review of phenotype–genotype correlation and the genetics of photosensitivity. The photoparoxysmal response in EEG (PPR) is still one of the best paradigms for exogenously triggered brain responses based on a genetic predisposition. The definition of the PPR phenotype requires multiple, precise methodologic guidelines.
Ulrich, Stephani, Ulrike, Tauer, Bobby, Koeleman, Dalila, Pinto, Bernd A, Neubauer, Dick, Lindhout   +5 more
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Patterns of intrahemispheric propagation in pediatric photoparoxysmal response [PDF]

Seizure, 2017
The photoparoxysmal response (PPR) is the most important EEG indication of photosensitivity (PS). It may be elicited by intermittent photic stimulation (IPS). PS mostly affects young individuals, with adolescent females at greatest risk. The diagnosis of PS is based on visual EEG assessment. To date, no objective test of PS has been established.Here we
Tymon, Skadorwa, Jolanta, Strzelecka
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Symmetry and interhemispheric propagation of paediatric photoparoxysmal response

Neurologia i Neurochirurgia Polska, 2020
To investigate the speculated interhemispheric symmetry and the pattern of propagation of paediatric photoparoxysmal response.Quantitative analysis of the photoparoxysmal response (PPR) to intermittent photic stimulation is a promising method of assessing photosensitivity (PS).
Tymon, Skadorwa, Jolanta, Strzelecka
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Wavelength Dependence of Photoparoxysmal Responses in Photosensitive Patients with Epilepsy [PDF]

Epilepsia, 1999
Summary:Purpose: We tried to specify the relation between the photoparoxysmal response (PPR) and the wavelength spectra of flashing light in various photosensitive epileptic syndromes in the physiologic state.Methods: Intermittent photic stimulation (IPS) by a Grass PS22 photic stimulator was performed with wavelength‐specific optical filters in ...
Y, Takahashi, T, Fujiwara, K, Yagi, M, Seino   +3 more
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The EEG Photoparoxysmal Response

Pediatric Neurology Briefs, 2008
Types of photosensitivity, prevalence and other characteristics of the photoparoxysmal response (PPR), associated seizures, effect of video games, and drug therapy are reviewed by the director of electroencephalography at the University of Illinois, Chicago.
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Focal photoparoxysmal response in the Heidenhain variant of CJD [PDF]

Neurology, 2016
A 73-year-old, right-handed man presented with new-onset right visual field diminution and visual hallucinations. Examination showed a right homonymous hemianopia without cognitive impairment. Brain imaging showed left occipital cortex abnormalities (figure, A and B).
Anteneh M, Feyissa, Elaine C, Wirrell, David T, Jones, Nathan P, Young, Jeffrey W, Britton   +4 more
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Wavelength Dependency of Photoparoxysmal Responses in Photosensitive Nonepileptic Subjects.

The Tohoku Journal of Experimental Medicine, 1997
Using specially made optical filters, we analyzed the wavelength dependency of photoparoxysmal responses (PPRs) in five photosensitive nonepileptic subjects. The wavelength spectrum around 700 nm (680-700 nm) was estimated as the only visible spectrum essential for eliciting PPRs in two normal trichromat nonepileptic subjects, although the effect of ...
Y, Takahashi, T, Fujiwara, K, Yagi, M, Seino   +3 more
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Overactive visuomotor connections underlie the photoparoxysmal response. A TMS study [PDF]

Epilepsia, 2015
SummaryObjectiveThe photoparoxysmal response (PPR) involves rapid spread of epileptic activity from visual to parietal and frontal areas. We used a transcranial magnetic stimulation (TMS) technique to assess the physiologic connections between primary visual (V1) and motor (M1) areas in patients with idiopathic generalized epilepsy (IGE).
Gionata Strigaro, Lina Falletta, Claudia Varrasi, John C. Rothwell, Roberto Cantello   +4 more
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