A revised glossary of terms most commonly used by clinical electroencephalographers and updated proposal for the report format of the EEG findings. Revision 2017

Kane, Nick; Acharya, Jayant N.; Benickzy, Sandor; Caboclo, Luís Otávio Sales Ferreira; Finnigan, Simon; Kaplan, Peter W.; Shibasaki, Hiroshi; Pressler, Ronit; Putten, Michel J.A.M. van

doi:10.1016/j.cnp.2017.07.002

Cited by 336 publications

(314 citation statements)

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“…The following EEG characteristics were evaluated: posterior dominant rhythm, diffuse slowing (mild, moderate, severe), focal slowing, rhythmic delta activity, ictal and interictal epileptiform discharges, periodic discharges, and EDB. Status epilepticus was defined as the occurrence of virtually continuous or repetitive epileptiform seizure pattern in an EEG, whereas seizure pattern was defined as a phenomenon consisting of repetitive epileptiform EEG discharges at>2c/s and/or characteristic pattern with quasi-rhythmic spatiotemporal evolution (ie, gradual change in frequency, amplitude, morphology and location) 15. EEG findings were subdivided into four categories: (1) normal EEG, (2) normal posterior rhythm (reactive, posterior dominant rhythm with an age-appropriate frequency) with diffuse or focal abnormalities, (3) lack of normal posterior rhythm, with focal or diffuse abnormalities, and (4) severely abnormal EEG, defined as lack of normal posterior rhythm with (A) severe slowing or (B) periodic discharges or (C) status epilepticus (adjusted from Amodio et al ) 16.…”

Section: Methodsmentioning

confidence: 99%

Predictive value of electroencephalography in anti-NMDA receptor encephalitis

Sonderen

Arends

Tavy

et al. 2018

J Neurol Neurosurg Psychiatry

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Section: Methodsmentioning

confidence: 99%

Predictive value of electroencephalography in anti-NMDA receptor encephalitis

Sonderen

Arends

Tavy

et al. 2018

J Neurol Neurosurg Psychiatry

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“…17 Seizure types were classified according to the 2017 Operational Classification of the International League Against Epilepsy (ILAE). 17 Seizure types were classified according to the 2017 Operational Classification of the International League Against Epilepsy (ILAE).…”

Section: Classification Signs and Symptomsmentioning

confidence: 99%

Epileptic phenotypes in children with early‐onset mitochondrial diseases

et al. 2019

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Objectives:To determine the prevalence of epilepsy in children with early-onset mitochondrial diseases (MDs) and to evaluate the epileptic phenotypes and associated features. Materials and Methods:Children affected by MD with onset during the first year of life were enrolled. Patients were classified according to their mitochondrial phenotype, and all findings in patients with epilepsy versus patients without were compared. The epileptic features were analyzed. Results:The series includes 129 patients (70 females) with median age at disease onset of 3 months. The median time of follow-up was 5 years. Non-syndromic mitochondrial encephalopathy and pyruvate dehydrogenase complex deficiency were the main mitochondrial diseases associated with epilepsy (P < 0.05). Seizures occurred in 48%, and the presence of epilepsy was significantly associated with earlier age at disease onset, presence of perinatal manifestations, and early detection of developmental delay and regression (P < 0.001). Epileptic encephalopathy (EE) with spasms and EE with prominent focal seizures were the most detected epileptic syndromes (37% and 27.4%). Several seizure types were recorded in 53.2%, with the unusual association of generalized and focal epileptic pattern. Disabling epilepsy was detected in 63% and was associated with early seizure onset, presence of several seizure types, epileptic syndrome featuring EE, and the recurrence of episodes of status epilepticus and epilepsia partialis continua (P < 0.05).Conclusions: Epilepsy in children with early-onset MD may be a presenting or a prominent symptom in a multisystemic clinical presentation. Epilepsy-related factors could determine a worst seizure outcome, leading to a more severe burned of the disease. K E Y W O R D Schildren, early onset, epileptic encephalopathy, epileptic spasms, mitochondrial diseases, mitochondrial epilepsy | 185 MATRICARDI eT Al.

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“…Some are easily recognisable such as vertex sharp waves in sleep; other less common sharp variants may be more challenging to identify correctly as benign, particularly if they manifest as runs of ‘rhythmic temporal theta bursts of drowsiness’, as in this patient 1. Recognising these benign variants and applying published criteria required to fulfil EEG definitions of ‘epileptiform’2 will help to distinguish physiological from pathological sharp activity.…”

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confidence: 97%