What is most likely to be produced by movement artifact in EEG monitoring?

Movement artifacts in EEG monitoring are typically characterized by interference or extraneous signals that distort the underlying brain activity measured. One common outcome of movement artifact is the appearance of asymmetrical activity, especially at 60 Hz. This frequency is often associated with electrical interference from sources such as fluorescent lights or electrical equipment, which can mimic or obscure actual brain activity.

When a patient moves, these artifacts can often overshadow the true neurological signals, causing well-defined patterns of electrical activity to become distorted. As a result, the EEG may show asymmetrical spikes or amplitudes at this frequency, leading to inaccuracies in interpretation.

In the context of EEG monitoring, delta wave patterns are generally associated with deep sleep or certain pathological states, which are unlikely to be specifically caused by movement artifacts. Biphasic waveforms can appear in various contexts but are not specifically indicative of movement artifacts. Power spectral density refers to the distribution of power across different frequency bands and is a measure rather than a pattern seen on the EEG itself. Therefore, the most relevant and likely product of movement artifact would indeed be the asymmetrical activity observed at the 60 Hz frequency.