How yawning switches the default-mode network to the attentional network by activating the cerebrospinal fluid flow.
Yawning is a behavior to which little research has been devoted. However, its purpose has not yet been demonstrated and remains controversial. In this article, we propose a new theory involving the brain network that is functional during the resting state, that is, the default mode network. When this network is active, yawning manifests a process of switching to the attentional system through its capacity to increase circulation of cerebrospinal fluid (CSF), thereby increasing clearance of somnogenic factors (prostaglandin D(2), adenosine, and others) accumulating in the cerebrospinal fluid.
['Walusinski|Olivier|O|']
D000241:Adenosine D001143:Arousal D001288:Attention D002555:Cerebrospinal Fluid D006706:Homeostasis D006801:Humans D009415:Nerve Net D015230:Prostaglandin D2 D012890:Sleep D015000:Yawning
yawning cerebrospinal fluid default mode network adenosine arousal sleep