Catch A Yawn :: Biology Essays Research Papers

Catch A YawnA trick in every girls handbook If you want to know if some unrivaled is checking you out, oscitancy and check to see who, if anyone, yawns back. While we may be victimization the contagious phenomenon of oscitance to our advantage, the age-old question still lingers on - why, in fact, is oscitant contagious? Plausible explanations range from historic origins to muscular requirements. However, one answer that encompasses all other questions about the cause and traits of yawning has save to be found. First, lets tackle the question of why we yawn. An evolutional/psychological theory has claimed that yawning was once used as a non-verbal form of communication to contemporise group behavior among animals (9). For example, the leader of a pack of wolves would yawn to mass a certain mood or signal a alternate of activity. Humans also being group-oriented animals may have assimilated to this form of agreement. In the same way that one pumped up team division can influe nce the level of aggression and team-spirit of an entire team, one yawning client can also affect the mood of sales-pitch meeting. Another commodity example of synchronization among humans is if a group is sitting nigh a campfire and the leader yawns, it most wantly will act as a signal to the others that it may be time to call it a night. Yawning is commonly perceived to be a sign of tedium or tiredness. Dr. Robert Provine, known as the yawn-expert from the University of Maryland, performed a study on 17-19 stratum old students to test this perception. In likeness to a group of students who watched medicine videos for 30 minutes, a group who watched an uninteresting color test head off pattern for 30 minutes yawned more (10). Dr. Provine also suggested that yawning is like stretching (5). Much like stretching, blood pressure and heart target can be increased just by yawning. Perhaps animals yawn instinctively when bored or tired to get their blood pumping so that they may b e physically stimulated to move or assay a new activity. But then why is it that we yawn by and by waking up? If we yawn after waking as a physical prompt to become active thats one thing. But yawning as a sign of tiredness can be govern out if we yawn after waking from a restful sleep. perchance a study could be done in which a comparison could be made between the hours of sleep and the occurrence of yawning when waking.