This statement reminded me of the ideas of the ancient Greeks about anatomy and physiology. According to them, a person needs a brain in order to cool the blood.
It does, but for a different reason. When a person is worried, excited, metabolism accelerates, he begins to lack oxygen. He begins to breathe through his mouth.
But to calm down, you can take one last deep breath, and then breathe through your nose under the count. 5 counts inhale, 5 exhale, for example. Breathing evens out, attention switches to a rhythm that is neutral to everything, you calm down.
And to ventilate the brain is, of course, a cheating idea. If we look at it this way, then when the head overheats, the person will not become excited, but, on the contrary, lethargic, depressed. At the very least, overheating means disruption of the brain, transmission of nerve impulses.
ps this study is googled: medpulse.ru
But this is on parrots, and the transfer to humans, it's strange. Look at the picture, red just above the nose, that's all that goes past the nose up. depositphotos.com
No, that's not true. Breathing through the nose has nothing to do with the possible "cooling" of the brain, and its "cooling" does not correlate in any way with the state of composure.