A spike on an EEG can be affected by which of the following frequencies?

A spike on an EEG, which is often seen in abnormal brain activities, typically carries a significant frequency component. High-frequency activity, particularly in the range of 20 Hz and above, is often associated with faster processing and can be indicative of important transitions in brain states.

The choice of 35 Hz aligns with the high-frequency spectrum, and spikes in EEG recordings can be influenced by these higher frequencies. This frequency range may reflect routine activity in certain cortical regions, particularly during alert or engaged states, making it plausible for higher frequency spikes to occur.

On the other hand, low-frequency components, while important for various brain activities and rhythms (such as delta and theta waves), are less likely to contribute directly to the development or identification of spiking activity. Generally, spikes themselves arise from a more active and engaged brain state, which is better captured in the higher frequency ranges. Thus, the frequency of 35 Hz is correctly identified as being relevant to the nature of spikes in EEG.