Subclinical Rhythmic Electrographic Discharge in Adults (SREDA) most often appears:

Subclinical Rhythmic Electrographic Discharge in Adults (SREDA) is characterized by sudden, rhythmic discharges that can be observed on an electroencephalogram (EEG). The defining attribute of this phenomenon is that it often presents unexpectedly during a resting EEG, which means it can appear without specific triggers or obvious symptoms. This characteristic aligns with SREDA's nature, as it typically manifests as isolated spike-wave complexes that are not associated with clinical seizures or overt clinical symptoms.

In understanding this context, it’s important to recognize that while photic stimulation and other conditions can influence EEG findings, SREDA is notably linked to its spontaneous appearance during a resting state rather than being prompted by external stimuli or occurring as a recurrent pattern at specific ages. The nature of SREDA makes it less likely to appear unilaterally or to be dependent on age, which distinguishes it from other types of EEG abnormalities.