Introduction: Subclinical rhythmic EEG discharges in adults (SREDA) is a very rare benign EEG pattern. The electrophysiological features and atypical variants of SREDA has wide spectrum and they are poorly known. It resembles ictal discharges, and overinterpretation of SREDA may lead to misdiagnosis of epilepsy.

Typical SREDA is described as “an unusual transient EEG pattern consisting of repetitive bilateral sharp contoured waveforms in the range of theta to delta frequency lasting for few seconds to minutes, distributed mainly over the parietal and temporal regions, without subsequent evolution in frequency, distribution or morphology”.

2023年7月5日 · Subclinical Rhythmic Electrographic Discharges (SREDA) are a type of EEG finding that can be seen in patients who do not have clinical seizures, but who may be at risk for developing seizures in the future. SREDA is characterized by rhythmic, high-amplitude discharges that occur at a frequency of 2-3 Hz in the temporal regions of the brain.

Subclinical rhythmic electrographic discharge of adults (SREDA) is the rarest benign epileptiform variant. It is an established EEG phenomenon that when present may cause confusion with an epileptic discharge for those unfamiliar with the entity.

Subclinical rhythmic EEG discharges in adults (SREDA) is a very rare benign EEG pattern. The electrophysiological features and atypical variants of SREDA has wide spectrum and they are poorly known. It resembles ictal discharges, and overinterpretation of SREDA may lead to misdiagnosis of epilepsy.

appearance; abrupt onset and termination, unlike seizures which evolve rhythmic, sharply contoured theta may evolve slow to fast (from 1-2 Hz to 5-6 Hz) like a "seizure in reverse"

The introduction of digital electroencephalograms (EEGs) and advances in digital signal processing provide an opportunity to restudy in more depth the nature of SREDA. We identified nine patients who had SREDA diagnosed on a routine EEG recording since the introduction of digital EEG to our laboratory in August 1995.

2001年4月1日 · Epochs from Patient 1’s electroencephalogram (EEG) illustrate the rhythmic EEG discharge reported as subclinical rhythmic EEG discharge of adults (SREDA). The first epoch (Ep1) demonstrates 14 and 6 positive spikes. Ep2 demonstrates the discharge in a coronal montage. Ep4 and Ep5 reveal SREDA while Patient 1 is asleep.

2023年10月11日 · Subclinical Rhythmic Electroencephalographic Discharges of Adults (SREDA) is a benign EEG variant characterized by sharply contoured rhythmic theta activity occurring bilaterally with maximum activity over the parietal or the posterior head region. These paroxysms are not associated with any objective or subjective clinical manifestations.

What is a Normal EEG variant the activity observed in larger populations who are without neurological impairments or other diseases & have no symptoms Terms used to describe EEG waveforms