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The breath hold is believed to further raise vagal tone, which brings down stress hormones and lifts heart rate variability.—Allison Palmer, Miami Herald, 23 May 2026 The non-invasive vagal nerve stimulator (nVNS), called gammaCore, is a small, handheld device placed on either side of the neck during a migraine or cluster headache.—Colleen Doherty, Verywell Health, 23 May 2026 Gargling vigorously enough that your eyes water slightly engages the same reflex doctors use clinically to check vagal function.—Allison Palmer, Fort Worth Star-Telegram, 6 May 2026 But social-evaluative threat — being watched, judged, and evaluated by others — causes vagal withdrawal.—Amy Cuddy, New York Times, 18 Feb. 2026 See All Example Sentences for vagal