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35 Possible Causes for Polyspike on Photic Stimulation

  • Benign Adult Familial Myoclonic Epilepsy

    Photic stimulation and hyperventilation were performed in all. RESULTS: Nineteen (eight men, 11 women) patients with BAFME were included in this study.[] […] wave in burst or isolation  Photic stimulation 40%  Theta rhythm of 5-6Hz in central and vertex 95% 43. 17 m. child with SW induced by opening and closing eyelids Recurrence[] Rare tonic-clonic seizures are also a manifestation and are often precipitated by photic stimulation, emotional stress, and sleep deprivation. • Diagnosis is based on clinical[]

  • Juvenile Myoclonic Epilepsy

    Two cases of juvenile myoclonic epilepsy (JME) presented with myoclonic jerks and EEG activation after eye closure, without sensitivity to intermittent photic stimulation.[] These discharges may be evoked by photic stimulation (blinking lights) and/or hyperventilation.[] These changes are often induced by photic stimulation (blinking lights) and sometimes hyperventilation.[]

  • Unverricht-Lundborg Syndrome

    There are generalized polyspike discharges at rest that are exacerbated by photic stimulation. Fig. 2 EEG of individual V-13 at age 35 years.[] There are generalized polyspike discharges at rest that are exacerbated by photic stimulation. Fig. 3 Axial ( A ) and coronal ( B ) MRI images of individual VI-7.[]

  • Generalized Clonic or Tonic-Clonic Seizures

    Specific EEG changes may be seen during photic stimulation. EEG abnormalities are more likely or increased with sleep deprivation and during sleep.[] Other information is obtained from tests such as: EEG (electroencephalogram) : people with EGTCS have normal EEG background and generalized spike wave or polyspike wave activity[]

  • Epilepsy

    Contemporary drug therapy fails to control epileptic seizures in some 30% of patients, resulting in the need to employ other measures when they appear practicable. A good deal of potentially relevant statistical detail is available regarding the outcomes of the available antiepileptic therapies, but its interpretation[…][]

  • Idiopathic Generalized Epilepsy

    These discharges are often precipitated by hyperventilation, sleep deprivation, and intermittent photic stimulation (IPS).[] EEG shows generalized discharges of spikes, polyspikes, or spike/polyspike-waves either ictally or inter-ictally.[]

  • Myoclonic-Astatic Epilepsy

    Photic stimulation may trigger generalised spike/wave or myoclonic astatic seizures.[] Intermittent photic stimulation may trigger generalized spike-and-wave and polyspike-and-wave, and myoclonic-atonic seizures.[] EEG: Usually normal background particularly at onset of syndrome, with frequent generalised discharges of 2 to 3 Hz spike/polyspike wave.[]

  • West Syndrome

    IARS2 encodes isoleucine-tRNA synthetase, which is aclass-1 amino acyl-tRNA synthetase. IARS2 mutations are reported to cause Leigh syndrome or cataracts, growth hormone deficiency, sensory neuropathy, sensorineural hearing loss, and skeletal dysphasia syndrome (CAGSSS). To our knowledge, IARS2 mutations and[…][]

  • Early Infantile Epileptic Encephalopathy Type 17

    @inproceedings{Kehrl2014GainoffunctionMI, title {Gain-of-function mutation in Gnao1: A murine model of epileptiform encephalopathy (EIEE17)?}, author {Jason M. Kehrl and Kinshuk Sahaya and Hans M. Dalton and Raelene A. Charbeneau and Kevin T. Kohut and Kristen A Gilbert and Madeline C. Pelz and Jack M. Parent and[…][]

  • Juvenile Absence Epilepsy

    However, on EEG, intermittent photic stimulation often facilitates generalized discharges and absences.[] EEG exclusion criteria : (1) Irregular, arrhythmic generalized discharges of spike-polyspike-slow waves with marked variations of the intradischarge frequency. (2) Significant[]

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