Yawning

Barbizet, J

doi:10.1136/jnnp.21.3.203

Cited by 106 publications

(89 citation statements)

References 13 publications

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“…Yawning is characterized by a large gaping of the mouth with a deep inspiration, a brief acme period with peak muscle contraction, and passive closure of the jaw with a shorter expiration of air (Barbizet 1958). This behavior appears highly conserved, with reported observations of yawns having been documented across vertebrate classes (Craemer 1924;Luttenberger 1975;Baenninger 1987;Sauer and Sauer 1967).…”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Variation in Self-Reported Contagious Yawning

Eldakar

Dauzonne

Prilutzkaya

et al. 2015

Adaptive Human Behavior and Physiology

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The thermoregulatory theory posits that yawns function to cool the brain in part due to counter-current heat exchange with the deep inhalation of ambient air. In support of this theory, previous cross-cultural research on humans has shown that self-reported contagious yawning frequency varies between seasons with distinct ambient temperature ranges. However, it remains possible that differences in yawning across seasons are a result of physiological circadian changes across the year rather than variation in ambient temperature. In an attempt to address this question, here we discuss the results of a study investigating the variation in the frequency of self-reported contagious yawning within a restricted range of a single season in one geographic location. A total of 142 pedestrians were recruited outdoors during an 18-day period over the summer in an equatorial monsoon climate in southern Florida, USA. Consistent with the thermoregulatory theory of yawning, results showed that self-reported contagious yawning frequency varied predictably across temperature gradients. This was true after statistically controlling for relative humidity, time of day, time spent outside, testing day, age of participant, and amount of sleep the night before. These findings provide further evidence suggesting a brain cooling function to yawning.

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Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Variation in Self-Reported Contagious Yawning

Eldakar

Dauzonne

Prilutzkaya

et al. 2015

Adaptive Human Behavior and Physiology

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“…Yawning clearly appears to be not just a matter of opening one’s mouth, but a generalized stretching of the muscles of the respiratory tract (diaphragm, intercostal), face and neck. Thus, it can be inferred that yawning is a part of the generalized stretch with which it is generally accompanied [1, 2]. …”

Section: Introductionmentioning

confidence: 99%

Yawning in Diseases

Walusinski¹

2009

Eur Neurol

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Yawning is a physiological behavior, an emotional stereotypy that indicates the homeostatic process of the mechanisms regulating rhythms, such as sleeping/waking, hunger/satiety or mating/relaxation, generated by the diencephalon. As with all physiological behaviors, its deregulation reveals disorders. In daily practice, yawning as a symptom is generally neglected. That is why we propose a wide overview of yawning in diseases, its consequences and significance.

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“…Yawning occurrence demonstrates an underlying circadian rhythmicity ( 1 ), and has been associated with sleepiness, drowsiness, and boredom ( 2 ). Research supports the hypothesis that yawning is associated with transitions in arousal levels ( 1 ).…”

mentioning

confidence: 67%

“…Yawning is an involuntary and stereotyped behavior consisting of three phases, a long inspiration phase, the mouth ' s wide opening, and the fi nal slow expiration ( 2 ). Yawning occurrence demonstrates an underlying circadian rhythmicity ( 1 ), and has been associated with sleepiness, drowsiness, and boredom ( 2 ).…”

mentioning

confidence: 99%