Which statement about neuromodulation devices is true?

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Neuromodulation devices treat migraine by directly altering neural activity in pain pathways, using electrical or magnetic stimuli rather than drugs. Because they can be used during a migraine attack to abort symptoms (acute treatment) or used regularly to reduce how often attacks occur (preventive treatment), many devices have regulatory clearance for both acute and preventive indications, or for multiple indications across different devices. This non-drug approach can be an option for patients who prefer nonpharmacologic therapy or who cannot tolerate medications.

The other statements don’t fit as well. These devices do not deliver drug therapy directly to the brain, so option that claims they deliver medications is incorrect. They are not ineffective in migraine management, and they aren’t limited to chronic prevention only since several devices have acute-use approvals as well.