Yawning

Arquivos de Neuro-Psiquiatria

Flávio Alóe¹ 

[1] ,University of São Paulo Medical School Sleep-Wake Disordes Center

关键词: yawning;    fatigue;    drowsiness;    brain hypoxia;    dopamine;    acetylcholine;    ACTH;    oxytocin;    bocejo;    fadiga;    hipoxia;    sonolência;    dopamina;    acetilcolina;    ACTH;    oxitocina;   

DOI  :  10.1590/S0004-282X1994000200023

来源: SciELO

【 摘 要 】

The ubiquitousness of normal yawning and the existence of abnormal yawning warrant an understanding of this reflex. Its mechanisms and functional role are not entirely known. A review of the literature reveals that yawning is a brain stem arousal reflex with both peripheral and central loops subserving reversal of brain hypoxia or hypoxemia. Behaviorally, yawning is a semi-involuntary act that occurs also because of loss of interest in the surroundings and it is not necessarily associated with fatigue. Socio-environmental factors can influence the emergence of yawning. Dopaminergic, acetylcholinergic, ACTHergic and oxytocinergic systems are involved in the generation and modulation of yawning in animal experimentation.

【 授权许可】

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