Results 131 to 140 of about 31,168 (186)

Contribution of intermittent photic stimulation to routine EEG

Neurophysiologie Clinique, 2021
Intermittent photic stimulation (IPS) is an activation procedure performed during electroencephalography (EEG) to detect photosensitive patients. This procedure is recommended in routine EEGs but the benefit of IPS in the general population is not clearly ascertained.We retrospectively analyzed 7683 EEGs of patients referred for a routine EEG to the ...
Clément Vialatte de Pémille, Saleheddine Rekik, Hélène Amiel, Elodie Meppiel, Alexandra Richard, Sana Masmoudi, Nathalie Kubis, Pierre Lozeron   +7 more
openaire   +3 more sources

Photic Stimulation and the EEG in Macular Disease

Archives of Ophthalmology, 1964
Berger in 1929 discovered what is now known as the a rhythm of the brain. This consists of oscillations of electrical potential at a frequency of 8½ to 12 per second and is best developed in the parieto-occipital region. This rhythm is best demonstrated with the eyes closed, and may be blocked by the subject's attention to vision with the eyes opened ...
Joseph Grader, Grant L. Heller
openaire   +3 more sources

Ictus Emeticus Induced by Photic Stimulation

Clinical Electroencephalography, 1988
It has been recently established that ictus emeticus originates from mesial temporal lobe structures. We herein report a patient with generalized epilepsy who exhibited ictus emeticus reflexly triggered by intermittent photic stimulation accompanied by generalized photoparoxysmal responses on the electroencephalogram. All seizures and EEG abnormalities
Daniel E. Jacome, Manuel Suarez, Manuel Suarez   +2 more
openaire   +3 more sources

Photic-stimulation in three species of baboons

Life Sciences, 1967
Abstract A high percentage of baboons of the species Papio papio have presented evidence of photomyoclonic epilepsy (2, 3 and 4). Four of the first group of 10 from Senegal (tested in the laboratories of Dr. R. Naquet, C.N.R.S.-I.N.P. 3, Marseille, France) presented characteristic clinical and electroencephalographic signs of the syndrome (2). Later,
E.K. Killam, L.G. Stark, K.F. Killam
openaire   +3 more sources

Hemodynamic responses to photic stimulation in neonates

Pediatric Neurology, 2000
A three-channel near-infrared monitoring system was used to evaluate the regional hemodynamic responses to photic stimulation during spontaneous sleep in seven healthy neonates. Three pairs of parallel light guides, separated by 15 mm each, were placed over a 450-mm(2) occipital region of the head.
Seiichiro Fujimoto, Satoru Okajima, Kazutoshi Cho, Tadashi Matsuda, Yoko Hoshi, Shunji Kohri, Yoshinori Matsumoto   +6 more
openaire   +3 more sources

Multiple response to photic stimulation in cats

American Journal of Physiology-Legacy Content, 1959
This study was carried out in order to compare the multiple cortical response to a photic stimulus and the secondary response to sciatic nerve stimulation. Late responses to flash and to sciatic nerve shock were recorded in acute cat preparations anesthetized with pentobarbital.
T. Corwin Fleming, Edward V. Evarts
openaire   +3 more sources

EXPERIENCE WITH PHOTIC STIMULATION IN PSYCHIATRIC RESEARCH

American Journal of Psychiatry, 1957
Intermittent photic stimulation has been of value in psychiatric research in a number of areas which include: (1) the development of screening techniques based upon the EEG driving response and subjective responses to photic stimulation; (2) correlated studies of photic stimulation with psychological tests; (3) studies relating driving response to ...
openaire   +3 more sources

Clinical Photic Stimulation

American Journal of EEG Technology, 1969
(1969). Clinical Photic Stimulation. American Journal of EEG Technology: Vol. 9, No. 1, pp. 10-17.
openaire   +2 more sources

Reversal in photic orientation in Volvox and the nature of photic stimulation

Zeitschrift f�r Vergleichende Physiologie, 1927
1. Volvox usually is photopositive in low and photonegative in high illumination, but the opposite obtains under certain conditions. 2. If it is dark adapted, it is always positive when exposed to light, no matter how intense, but it soon becomes negative if the light is sufficiently intense and the higher the intensity the shorter the ...
openaire   +2 more sources

The application of electro-luminescence to photic stimulation

Electroencephalography and Clinical Neurophysiology, 1966
Abstract A new method of photic stimulation is described which uses two electro-luminescent panels mounted in a pair of goggles. When suitably excited by AC, the panels become uniformly illuminated over the whole surface. Flicker is produced by modulating the exciting AC, and a circuit is given for producing square wave modulation of the panel ...
openaire   +3 more sources