What common artifacts might be seen during an EEG and interfere with recordings?

The presence of common artifacts during an EEG includes eye blinks, muscle movements, and electrical interference, which can significantly distort the recordings and obscure the underlying brain activity being monitored. Eye blinks produce a characteristic waveform that can obscure the EEG signal and misconstrue the interpretation of brain activity. Similarly, muscle movements, whether from the patient's physical actions or muscle tension, can produce high-frequency noise that interferes with the detection of the brain’s electrical signals. Electrical interference, often arising from external sources such as nearby machinery or inadequate grounding of the EEG equipment, can also create significant disruption in the readings.

In contrast, while rapid eye movement during sleep is a natural phenomenon that occurs in the sleep cycle, it does not generally result in artifacts on the EEG that would interfere with the overall recording process. Changes in blood pressure and temperature fluctuations, although they can impact general health and well-being, do not typically present as artifacts within the EEG recordings themselves. Thus, those options do not relate directly to the immediate disturbance of EEG signals in the way that the initial group does.