Search results
Results from the WOW.Com Content Network
Amplitude integrated electroencephalography (aEEG), cerebral function monitoring (CFM) or continuous electroencephalogram (CEEG) is a technique for monitoring brain function in intensive care settings over longer periods of time than the traditional electroencephalogram (EEG), typically hours to days.
The EEG in childhood generally has slower frequency oscillations than the adult EEG. The normal EEG also varies depending on state. The EEG is used along with other measurements (EOG, EMG) to define sleep stages in polysomnography. Stage I sleep (equivalent to drowsiness in some systems) appears on the EEG as drop-out of the posterior basic rhythm.
EEG-fMRI (short for EEG-correlated fMRI or electroencephalography-correlated functional magnetic resonance imaging) is a multimodal neuroimaging technique whereby EEG and fMRI data are recorded synchronously for the study of electrical brain activity in correlation with haemodynamic changes in brain during the electrical activity, be it normal function or associated with disorders.
The Fourier decomposes the EEG time series into a voltage by frequency spectral graph commonly called the "power spectrum", with power being the square of the EEG magnitude, and magnitude being the integral average of the amplitude of the EEG signal, measured from(+) peak-to-(-)peak), across the time sampled, or epoch.
EEG analysis is exploiting mathematical signal analysis methods and computer technology to extract information from electroencephalography (EEG) signals. The targets of EEG analysis are to help researchers gain a better understanding of the brain ; assist physicians in diagnosis and treatment choices; and to boost brain-computer interface (BCI ...
A comparison of an awake, resting (with activity), normal EEG with a hypsarrhythmia EEG. The hypsarrhythmia EEG is from a 4-month old girl with cryptogenic West syndrome . In it high amplitude waves and spikes are present, randomly appearing and with no topographical distribution identified; also, there is no frequency nor amplitude gradient ...
Example hypnogram of a normal, healthy adult Here, both stage 3 and stage 4 are shown; these are often combined as stage 3. A hypnogram is a form of polysomnography; it is a graph that represents the stages of sleep as a function of time.
The sample of human EEG with prominent alpha-rhythm in occipital sites Alpha waves were discovered by German neurologist Hans Berger , the inventor of the EEG itself. Alpha waves were among the first waves documented by Berger, along with beta waves , and he displayed an interest in "alpha blockage", the process by which alpha waves decrease ...