photic stimulation

pho·tic stim·u·la·tion

the use of a flickering light at various frequencies to influence the pattern of the occipital electroencephalogram and also to activate latent abnormalities.
References in periodicals archive ?
After reviewing the "flash" literature, we speculate on ways that millisecond photic stimulation could be applied in the clinic.
Other EEG studies (see Sadleir, Scheffer & Smith, 2008; Sadleir, Scheffer, Smith, Carstensen, Farrell & Connolly, 2009) have also been used in the diagnosis of other CAE features such as photic stimulation, and hyperventilation.
To detect brain responses, we measured event-related potentials (ERP) while a photic stimulation was applied repetitively.
Electroencephalography: Background activity, response to intermittent photic stimulation, hyperventilation, and other pathological findings were investigated by an experienced clinical neurophysiologist (BB).
Photic stimulation 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 (34.5%), while focal EEG abnormalities were recorded in 25 of our patients (28.7%).
Intermittent photic stimulation was carried out in all patients with eyes closed.
More common techniques used to provoke all patients with seizures include hyperventilation, photic stimulation, sleep deprivation, and AED withdrawal.
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.