Intermittent Rhythmic Delta Activity
Intermittent rhythmic delta activity (IRDA) is a type of Neural oscillation, brain wave abnormality found in electroencephalograms (EEG). __TOC__ Types It can be classified based on the area of brain it originates from: * frontal (FIRDA) * occipital (OIRDA) * temporal (TIRDA) It can also be * Unilateral * Bilateral Cause It can be caused by a number of different reasons, some benign, unknown reasons, but also are commonly associated with lesions, tumors, and encephalopathy, encephalopathies. Association with periventricular white matter disease and cortical atrophy has been documented and they are more likely to show up during acute metabolic derangements such as uremia and hyperglycemia. Diagnosis References

Electroencephalography Neuroscience {{nervoussystem-disease-stub ...
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Neural Oscillation
Neural oscillations, or brainwaves, are rhythmic or repetitive patterns of neural activity in the central nervous system. Neural tissue can generate oscillatory activity in many ways, driven either by mechanisms within individual neurons or by interactions between neurons. In individual neurons, oscillations can appear either as oscillations in membrane potential or as rhythmic patterns of action potentials, which then produce oscillatory activation of post-synaptic neurons. At the level of neural ensembles, synchronized activity of large numbers of neurons can give rise to macroscopic oscillations, which can be observed in an electroencephalogram. Oscillatory activity in groups of neurons generally arises from feedback connections between the neurons that result in the synchronization of their firing patterns. The interaction between neurons can give rise to oscillations at a different frequency than the firing frequency of individual neurons. A well-known example of macros ...
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