Which frequency would likely introduce artifacts when enhancing slow waves in EEG?

In the context of EEG (electroencephalography), enhancing slow waves involves manipulating frequency bands to gain better insights into brain activity. High frequencies, such as 35 Hz, can introduce artifacts during this enhancement process.

When slow waves are being analyzed, particularly at lower frequencies, the introduction of a high frequency like 35 Hz may lead to the masking or distortion of the slower electrical activity that is being studied. High-frequency signals can produce noise that interferes with the clear visualization of the brain’s natural slow-wave oscillations. This could result in inaccuracies when interpreting EEG data, as the rapid fluctuations may not represent true brain activity associated with slower waves.

In contrast, lower frequencies such as 0.3 Hz, 1 Hz, and 5 Hz are closer to the range of natural slow wave activity in the brain and are less likely to introduce disruptive artifacts. These frequencies are more aligned with normal theta and delta rhythms and are generally more supportive of slow-wave analysis rather than distorting it. Therefore, high frequencies pose a significant risk of creating artifacts that can obscure the meaningful components of slow-wave EEG signals.