The researchers observed 36 adults, who were made to watch videos of another person yawning
Importantly, they have discovered that the urge to yawn -- our propensity for contagious yawning
-- is individual to each one of us.
Hence excessive or intractable yawning
has to be kept in mind while prescribing the so called most safe anti-depressant class of medication, the SSRIs, in this case fluoxetine.
also may be related to epilepsy, multiple sclerosis and brain tumors.
In the study 328 participants were shown a three-minute video showing other people yawning
occurs not only in humans, but also in chimpanzees and other animals, in response to hearing about, seeing or thinking about yawning
Romero in the university's Department of Cognitive and Behavioral Sciences explains further: "Although our study cannot determine the exact underlying mechanism operative in dogs, the subjects' physiological measures taken during the study allowed us to counter the alternative hypothesis of yawning
as a distress response.
Other people believe that yawning
is a protective reflex to redistribute the oil-like substance called surfactant that helps keep lungs lubricated inside and keeps them from collapsing.
While it is well known that foetuses open and close their mouths, experts have disagreed over whether or not they are actually yawning
has never been determined this clear.
Participants were divided up into "triggers" - who instigated yawning
- and "observers" who responded by yawning
Research has shown that between 40 and 60 per cent of people are prone to contagious yawning
and 33 per cent of chimpanzees will yawn back at humans.
This involuntary reaction, seemingly unique to humans and chimps, is caused by cues ranging from watching someone yawn to thinking about yawning
The mystery of yawning
in physiology and disease, O.
Just as yawning
seems to spread contagiously from person to person, it seems to also spread from people to domestic dogs (Canis familiaris).