In this respect, one should note that intermittent photic stimulation
and hyperventilation have been found to induce the absence of seizures in at least 21% and 83% of patients, respectively.
Electroencephalography: Background activity, response to intermittent photic stimulation
, hyperventilation, and other pathological findings were investigated by an experienced clinical neurophysiologist (BB).
and hyperventilation were used during the EEG recordings.
These responses include single-tentacle responses, coordinated tentacular responses, and responses to direct on-off photic stimulation
of the rhopalia.
Photoparoxysmal response (PPR) is defined as the occurrence of spikes, spike waves, poly-spike waves, or repetitive spikes in response to intermittent photic stimulation
, which was observed in 30 patients (34.
Intermittent photic stimulation
was carried out in all patients with eyes closed.
has been implicated in seizure induction and has been shown to induce generalized seizures.
d) Photic stimulation
at frequencies 1, 3, 5, 6, 7, 10, 15, 20, 25 and 30/Sec.
Most (117) underwent intermittent photic stimulation
EEG between seizures.
For the EEG studies we used a the Neuroscop-416 16-channel electroencephalograph with electrodes, manufactured by BIOLA Ltd, Moscow, a cap for affixing the electrodes, goggles to provide rhythmic photic stimulation
and a computer (P4 processor with a 512 MB memory, and a 200 GB disk) loaded with the Neuroscop program for recording, storing and analyzing resulting data.
Eligible subjects are those patients with demonstrated epileptiform activity by electroencephalogram (EEG) in response to photic stimulation
(also called a "photoparoxysmal response to light") and represent a small subset of all patients with epilepsy.
In the present study, we analyzed the changes in the vascular density and cells associated with the elimination of photic stimulation
in rats by means of retinal damage.