Which medication would be expected to increase beta frequency activity?

The correct answer is related to the understanding of how different medications influence brain activity as represented in an EEG. Paxil (paroxetine) is a selective serotonin reuptake inhibitor (SSRI) that is primarily used for treating depression and anxiety disorders. SSRIs like Paxil can lead to an increase in beta frequency activity in the brain.

Beta activity is typically associated with wakefulness, alertness, and cognitive processing. Medications that enhance serotonin levels can positively affect mood and anxiety, potentially leading to increased beta wave activity, which is often observed during states of heightened alertness and focused mental activity. Therefore, Paxil is expected to have this stimulating effect on beta activity.

The other medications listed may have different effects: Topamax is an anticonvulsant that may reduce beta activity due to its central nervous system depressant effects. Xanax, being a benzodiazepine, typically reduces overall brain activity and can lead to increased theta activity instead. Imitrex, primarily used for migraine relief, can affect blood flow in the brain and might not directly influence beta frequency in the way that Paxil does. Thus, the action of Paxil aligns best with an increase in beta frequency activity on an EEG.