Factors Behind Excessive Yawning
yawn is the rude response of the body to tiredness , sleepiness , and ennui . It is quite natural for masses to yawn in the middle of a foresighted lecture or in a conference where discourse is not of interest to a special individual . oscitance is a cognitive operation in which the mouth open up involuntarily to inhale air and fill the lungs with it . The time of oscitancy may be short or recollective and sometimes they are also accompanied by tearing ....