Continuous spike and waves during sleep is an age-related epileptic encephalopathy that presents with neurocognitive regression, seizures, and an EEG pattern of electrical status epilepticus during sleep. Patients usually present around 5 years of age with infrequent nocturnal unilateral motor seizures that progress within 1 to 2 years to a severe epileptic encephalopathy with frequent seizures...

UNLABELLED In this study, we present the electroclinical features and evolution of patients with epileptic spasms (ES) in clusters without hypsarrhythmia and with or without focal or generalized paroxysmal discharges on the interictal EEG. We also discuss how to nosologically define these cases. METHODS Between February 1, 1990, and December, 2009, sixteen patients met the electroclinical dia...

introduction: computer games have attracted remarkable attentions in general publics with different cultures and their effects are subject of research by cognitive neuroscientists. in the present study, possible effects of the game fifa 2015 on cognitive performance, hormonal levels, and electroencephalographic (eeg) signals were evaluated in young male volunteers. methods: thirty two subjects ...

Endosulfan can induce convulsions that could lead to brain damage. The variability and lack of specificity of neurological signs and symptoms in the pre-convulsive stages makes early diagnosis difficult. We sought to determine if electrophysiological exploration of the cerebral cortex could yield objective signs of endosulfan intoxication at levels that do not elicit convulsions. Endosulfan was...

Periodic electroencephalographic (EEG) patterns consist of discharges usually epileptiform in appearance, which occur at regular intervals, in critical patients. They are commonly classified as periodic lateralized epileptiform discharges (PLEDs), bilateral independent PLEDs or BIPLEDs, generalized epileptiform discharges (GPEDs) and triphasic waves. Stimulus-induced rhythmic, periodic or ictal...

The hierarchical interaction between electrical signals of the brain and heart is not fully understood. We hypothesized that the complexity of cardiac electrical activity can be used to predict changes in encephalic electricity after stress. Most methods for analyzing the interaction between the heart rate variability (HRV) and electroencephalography (EEG) require a computation-intensive mathem...

Improving EEG signal interpretation, specificity, and sensitivity is a primary focus of many current investigations, and the successful application of EEG signal processing methods requires a detailed knowledge of both the topography and frequency spectra of low-amplitude, high-frequency craniofacial EMG. This information remains limited in clinical research, and as such, there is no known reli...

We introduce an anatomical and electrophysiological model of deep brain structures dedicated to magnetoencephalography (MEG) and electroencephalography (EEG) source imaging. So far, most imaging inverse models considered that MEG/EEG surface signals were predominantly produced by cortical, hence superficial, neural currents. Here we question whether crucial deep brain structures such as the bas...

SEVERAL RECENT STUDIES HAVE SHOWN that sleep with EEG slow waves is periodically interrupted by brief episodes of sleep with low-voltage fast EEG activity and rapid eye movements (REMs) (7, 8, 18, 19). During these episodes, single waves or groups of two to three waves appear in the lateral geniculate body in association with the REMs (6, 21). Each wave has an amplitude of 100-200 pV., a durati...

February 2009 Version 10 EEG SHARP ACTIVITY: MORPHOLOGICAL, NEUROPHYSIOLOGICAL AND BIOCHEMICAL FEATURES Spike/sharp waves, morphological features: The spike/sharp wave activity are hypersynchronous discharge pattern of large amount of epileptic neuronal aggregates. Spike A spike is a pointed peak transient clearly distinguished from the ongoing EEG activity. The distinction between the spike an...