Where does this come from, and can I check it?

Inhaling deep cool air regulates brain temperature during fatigue transition. The figure is taken from NIH, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a human body fact?

Yes. It sits on the Human Body shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Yawning helps cool the brain and increase mental alertness

Inhaling deep cool air regulates brain temperature during fatigue transition

While yawning was long thought to simply boost blood oxygen, physiological research suggests it acts as a thermal regulation mechanism. Deep inhalation of cool air coupled with jaw stretching increases blood flow to the cranium, cooling the brain to restore alertness.

Where this comes from

NIH

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

Science trivia Sleep Calculator

More facts like this

The human body contains up to four million sweat glandsEccrine and apocrine glands secrete watery sweat to cool body surface Human thermoregulation maintains a core temperature near thirty-seven degreesSweating vascular dilation and shivering maintain narrow thermal boundaries Shivering generates internal heat through rapid muscle twitchesInvoluntary muscle contractions burn energy to maintain stable body temperature The hypothalamus links the nervous system to the endocrine systemSmall brain region controls pituitary gland output and body homeostasis Oxytocin promotes social bonding trust and maternal attachmentNeuropeptide release fosters emotional connection and physical touch response The brain flushes metabolic waste products while you sleepCerebrospinal fluid sweeps through tissue spaces to remove toxic proteins

Tags: brain, yawning, thermoregulation

Yawning helps cool the brain and increase mental alertness: the short answers

Where does this come from, and can I check it?: Inhaling deep cool air regulates brain temperature during fatigue transition. The figure is taken from NIH, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a human body fact?: Yes. It sits on the Human Body shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.