The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
And the parafacial nucleus is involved in any time you double up the inhales or double up the exhales... when we do this physiological sigh, we tap into neural circuitry that allows us to speak more clearly, to control the muscles of the face and jaw.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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In fact, the parafacial nucleus is the one that you're relying on while you speak in order to make sure that you still get enough oxygen. It's also the one that you will use if you incorporate the physiological sigh or box breathing.
And the parafacial nucleus is involved in patterns of breathing where there is not an inhale followed by exhale, inhale followed by exhale-- that is, it's not rhythmic, one than the other-- but, rather, where there is a doubling up of inhales or a doubling up of exhales or a deliberate pause in breathing, so inhale, pause, exhale, pause, inhale, pause, exhale, pause, this sort of thing.