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16 Possible Causes for EEG Periodic Patterns, Paroxysmal Activity - Sharp-Waves

  • Epilepsy

    […] background, diffusemultifocal sharp waves and sharp waves-slow waves; paroxysmal fast activity Neurological examination mild diffuse hypotonia, mild ataxia with wide based[] […] discharges, diffuse (poly)spikes not available slow background, diffuse slow spike-wave discharges, sharp waves-slow waves; (poly)spike waves; paroxysmal fast activity slow[] […] hypsarrhythmia Course of EEG slow background, slow generalized spike-wave discharges and multifocal (poly)spikes slow background, left temporal slowing, slow generalized spike-wave[]

  • Encephalitis

    Rev Neurol (Paris). 2018 Apr;174(4):228-236. doi: 10.1016/j.neurol.2017.11.004. Epub 2018 Mar 31. Author information 1 Centre de référence maladies rares 'Syndromes neurologiques paranéoplasiques', hospices civils de Lyon, hôpital neurologique, neurologie B, 69677 Bron, France; INMG (NeuroMyoGene Institut), Inserm U1217/CNRS[…][]

  • Creutzfeldt Jakob Disease

    OBJECTIVE: We aimed to redefine various periodic patterns (PPs) observed on electroencephalography (EEG) in patients with sporadic Creutzfeldt-Jakob disease (sCJD) using the[] Kunze, Clinical changes and EEG patterns preceding the onset of periodic sharp complexes in Creutzfeldt — Jakob disease, Acta Neurologica Scandinavica, 97, 2, (99-106), (2009[] It also became apparent that the duration could vary greatly ranging from weeks to several years as did the electroencephalographic (EEG) patterns that had the characteristic[]

  • Encephalopathy

    This EEG pattern is continuous and remains unchanged during both waking and sleeping states. Structural abnormalities can often be seen on cranial MRI.[] […] and paroxysmal bursts of sharp and slow waves, these drugs increase epileptiform activity in known epileptic patients, clozapine increase bilateral spike waves discharges[] […] such as triphasic waves, periodic discharges, NCSE, coma patterns (alpha, theta and spindle), burst suppression, or others were excluded from this investigation.[]

  • Rolandic Epilepsy

    But, for the period of time while the disorder is active, some children will have learning difficulties and behavioral problems.[] pattern consisting of a midtemporal-central spike focus The medical literature said the condition is considered benign because most children with the condition outgrow the[] […] characterized by: nocturnal generalized seizures of focal onset (in one general area of the brain) diurnal (daily) partial seizures arising from the lower rolandic area an EEG[]

  • Benign Adult Familial Myoclonic Epilepsy

    ., positive or negative myoclonus, duration of EMG burst, rhythmicity and periodicity, synchrony of agonist and antagonist muscles, distribution of myoclonus, spreading pattern[] Alvarez and Lombroso reported hypnagogic paroxysmal spike wave activity (minimal epileptiform features, sharp waves embedded into hyperventilation , or hypnagogic hypersynchrony[] […] of 3 to 10 seconds (suppression-burst pattern).[]

  • Benign Familial Infantile Epilepsy Type 4

    This is done by performing an electroencephalogram or EEG. This is a painless and non-invasive means of recording the patterns of electrical activity of the brain.[] The EEG examination showed diffuse abnormal background activity, with sporadic isolated bilateral sharp waves over the occipital regions (a).[] KCNQ2E is often associated with a burst-suppression pattern on EEG but may have other non-specific abnormalities and is typically not normal between seizures, in contrast[]

  • Pyridoxine Dependency Syndrome

    The typical EEG pattern is a consistent (wake and sleep) “suppression-burst” pattern with periods of diffuse amplitude suppression alternating with bursts of high amplitude[] The most noteworthy interictal pattern consists of bursts or runs of high voltage relatively bilaterally synchronous 1-4 Hz activity with intermixed spikes and or sharp waves[] Diagnosis of Ohtahara syndrome is based on the clinical picture and EEG findings. The prognosis is poor, with many affected children dying in infancy.[]

  • Postictal State

    There were muscle jerks just before and just after the flat period of the EEG (J.G. van Dijk, unpublished results).[] For each seizure, the following elements were observed: 1) activity at seizure onset including spikes, sharp waves, desynchronization and irregular paroxysmal activity; 2)[] The slow-flat-slow pattern has most often been described for syncope involving asystole (Gastaut, 1974 ; Stephenson, 1990 ; Breningstall, 1996 ), but can occur without asystole[]

  • Paroxysmal Exertion-Induced Dyskinesia

    , a monorthythmic pattern, burst suppression, generalized periodic discharges, very low voltage tracing, and generalized suppression The Lennox-Gastaut syndrome EEG is characterized[] : interictal (gen spikes/sharps, irregular, asym theta/delta slowing in tonic sz, 3 hz spike-wave, gen paroxysmal fast activity, Hypsarthymia) 3hz spike and wave (interictal[] […] variability, reactivity to external stimuli, varying sleep patterns, increase in background frequencies Poor prognostic factors on the EEG invariant pattern, no reactivity[]

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