Which of the following is a characteristic feature of Mittens in EEG recordings?

In EEG recordings, Mittens is characterized by normal waveform patterns. This refers to the typical appearance of the background EEG activity that can be seen in healthy individuals, especially when they are in a resting state. Normal waveform patterns indicate that the brain is functioning properly, showing activity that is consistent with expected physiological processes.

Other potential characteristics, such as high amplitude spikes or indicators of brain dysfunction, would not align with the definition of Mittens. Similarly, while patient drowsiness can alter EEG patterns significantly, Mittens does not specifically correlate with drowsiness; instead, it reflects a state of normal brain activity. Thus, the hallmark feature of Mittens in EEG is indeed the presence of normal waveform patterns, differentiating it from various abnormal activities seen in other conditions.