The bigger your brain, the longer you yawn | Science | AAAS
2016年10月4日 · Primates tended to yawn longer than nonprimates, and humans, with about 12,000 million cortical neurons, had the longest average yawn, lasting a little more than 6 seconds. The yawns of tiny-brained mice, in contrast, were less than 1.5 seconds in duration.
Body language signals for rodent social communication in rodents
Yawning is a social signal in many species (Guggisberg et al., 2010), but we know little about if and how yawning functions as a social signal in rats (Moyaho et al., 2017). Mice also spontaneously engage in social facial whisker touch ( Heckman et al., 2017 ) and neonatal whisker trimming leads to social behavior deficits in adult ( Soumiya et ...
Why are yawns contagious? We asked a scientist | PBS News
2018年7月17日 · There is no scientific consensus on why we yawn. One theory argues that when humans are tired, we stop taking deep breaths, which causes a build-up of carbon dioxide in the body, said Douglas...
Yawn - Wikipedia
A yawn is a reflex in vertebrate animals characterized by a long inspiratory phase with gradual mouth gaping, followed by a brief climax (or acme) with muscle stretching, and a rapid expiratory phase with muscle relaxation, which typically lasts a few seconds.
Yawning: a cue and a signal - PMC - PubMed Central (PMC)
Yawning—a deep inspiration with mouth opening and slow expiration—is a widespread behaviour amongst all vertebrates.
Brain size and neuron numbers drive differences in yawn ... - Nature
2021年5月6日 · Yawning is a stereotyped action pattern characterized by an involuntary and powerful gaping of the jaw with deep inspiration, followed by a temporary period of peak muscle contraction and a...
The causes and consequences of yawning in animal groups
2022年5月1日 · Yawning is a highly conserved neurophysiological adaptation among vertebrates. The detection of yawning appears to be biologically important in social species. The observation of yawning in conspecifics selectively enhances vigilance. Yawn contagion appears to function in promoting motor synchrony in groups.
baby mouse yawn - YouTube
My mouse pup's big yawn :)
There's an Odd Correlation Between Brain Size And Yawning, …
Researchers collected data on 1,291 separate yawns from zoo trips and online videos, covering a total of 55 mammal species and 46 bird species. They found "robust positive correlations" between how long an animal yawns and the size of its brain.
Yawn duration predicts brain weight and cortical neuron number …
2016年10月1日 · Research indicates that the motor action pattern of yawning functions to promote cortical arousal and state change through enhanced intracranial circulation and brain cooling.
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