Results 11 to 20 of about 31,168 (186)

Photic Stimulation: Standardization of Screening Methods [PDF]

open access: yesEpilepsia, 1999
Summary:Purpose: Differences in methodology of intermittent photic stimulation within and between countries in Europe make collaborative research and interpretation of results difficult.Method: Experts in the field of photic stimulation from European countries have given an overview of methods used in routine photic stimulation.
D.G.A. Kasteleijn-Nolst Trenité   +3 more
openaire   +6 more sources

Frequency of intermittent photic stimulation: Effect on photic afterdischarges, photic driving, and behavioral activity [PDF]

open access: yesBulletin of the Psychonomic Society, 1976
The effects of various frequencies of intermittent photic stimulation (1/7, 1/3.5, 1/1, 3/1, 6/1, 9/1, 15/1, 18/1, 24/1, and 60/1 sec) on photically evoked afterdischarges (PhADs), photic driving (PD), and behavioral activity (gridcrossings) were examined in rats.
Donov An E. Fleming, Erin D. Bigler
openaire   +2 more sources

PHOTIC STIMULATION AND LEG MOVEMENTS IN THE CRAYFISH [PDF]

open access: yesJournal of General Physiology, 1933
When Cambarus clarkii is exposed to a source of light so that both eyes are equally illuminated, leg movements of the two sides are equal in frequency and amplitude. On covering one eye and exposing the uncovered eye to light, leg movements on the side of the uncovered eye are more frequent and are of greater amplitude than on the side ...
Benjamin Kropp, E. V. Enzmann
openaire   +3 more sources

Dynamic models in fMRI [PDF]

open access: yes, 1998
Most statistical methods for assessing activated voxels in fMRI experiments are based on correlation or regression analysis. In this context the main assumptions are that the baseline can be described by a few known basis-functions or variables and that
Auer, Dorothee P.   +2 more
core   +1 more source

A statistical technique for measuring synchronism between cortical regions in the EEG during rhythmic stimulation

open access: yes, 2001
The coherence function has been widely applied in quantifying the degree of synchronism between electroencephalogram (EEG) signals obtained from different brain regions.
Infantosi, A.F.C.   +2 more
core   +1 more source

Resposta fotoparoxística [PDF]

open access: yes, 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.
Campos, Carlos J. Reis De   +3 more
core   +2 more sources

PMS, EEG, and Photic Stimulation [PDF]

open access: yesJournal of Neurotherapy, 1997
Abstract Two studies of premenstrual syndrome (PMS), EEG, and photic stimulation have recently been completed at the Royal Postgraduate Medical School, Hammersmith Hospital, London (UK). In a preliminary trial of photic stimulation as a treatment for PMS, seventeen women with PMS were treated with a take-home flashing light device for 15 to 20 minutes ...
openaire   +2 more sources

Arrhythmic perch hopping and rhythmic feeding of starlings in constant light: Separate circadian oscillators? [PDF]

open access: yes, 1984
Perch hopping activity and food intake were recorded in starlings in different intensities of continuous illumination (LL), varying from 0.1 to 1000 lux. Circadian rhythmicity in perch hopping disappeared in 10 lux and all higher intensities. In contrast,
Daan, S.,   +2 more
core   +2 more sources

Uniform decrease of alpha-global field power induced by intermittent photic stimulation of healthy subjects [PDF]

open access: yes, 2010
Nineteen-channel EEGs were recorded from the scalp surface of 30 healthy subjects (16 males and 14 females, mean age: 34 years, SD: 11.7 years) at rest and under trains of intermittent photic stimulation (IPS) at rates of 5, 10 and 20 Hz.
Koch, Horst Josef   +2 more
core  

Influence of sinusoidally modulated visual stimuli at extremely low frequency range on the human EEG Activity [PDF]

open access: yes, 2006
The purpose of this study was to investigate whether sinusoidally modulated visual stimuli at extremely low frequencies (ELF) of 50, 16.66, 13, 10, 8.33 and 4Hz could influence the changes in EEG activity in 33 human subjects.
Cosic, I, Cvetkovic, D, Simpson, D
core   +1 more source

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