Which filter would most effectively reduce bitemporal 40hz muscle artifact?

To effectively reduce bitemporal 40 Hz muscle artifact, a high-frequency filter of 35 Hz is appropriate. This specific filter setting allows for the attenuation of signals above the selected frequency, in this case, 35 Hz. Since the muscle activity producing the bitemporal artifact occurs at 40 Hz, applying a high-frequency filter set at 35 Hz will significantly reduce this unwanted artifact while allowing lower-frequency brain activity to remain intact.

Using a high-frequency filter that is higher than 40 Hz, such as 50 Hz or 70 Hz, would not provide an effective means of reducing the bitemporal muscle artifact, as the 40 Hz activity would largely remain unaffected by those filters. On the other hand, a low-frequency filter at 5 Hz is not relevant for reducing higher-frequency artifacts, as it allows the higher frequency signals to pass through while removing lower frequency brainwaves.

Thus, the selection of a high-frequency filter at 35 Hz effectively targets the specific muscle artifact frequency while maintaining the integrity of brain waves in the lower frequencies.