Not enough sleep?!
Question: how much is enough sleep?? for a 15 yr.. old
i had 9 hrs of sleep last night & i thought that was enough and i felt good until i got to work and just couldn't stop yawing then my boss started whinging @ me for doing it & that really pissed me off.
how can i stop so i don't hear him whinge @ me again
Answers: how much is enough sleep?? for a 15 yr.. old
i had 9 hrs of sleep last night & i thought that was enough and i felt good until i got to work and just couldn't stop yawing then my boss started whinging @ me for doing it & that really pissed me off.
how can i stop so i don't hear him whinge @ me again
Yawning may boost brain's alertness
* 02 July 2007
* NewScientist.com news service
* Rowan Hooper
Yawning is not something we usually aim to provoke among our readers, but have a yawn now. Does your brain feel cooler? Do you feel more attentive? According to psychologists Andrew Gallup and Gordon Gallup of the State University of New York at Albany, that is why we yawn: to boost blood flow and chill the brain.
Not only that, brain-cooling explains why you can "catch" a yawn, says Gordon Gallup. "We think contagious yawning is triggered by empathic mechanisms which function to maintain group vigilance." In other words, yawn-catching evolved to help raise the attentiveness of the whole group.
The pair recruited 44 college students to watch, individually, films of people yawning and recorded the number of contagious yawns each volunteer made. Students were told to inhale and exhale in one of four ways: strictly orally; strictly nasally; orally while wearing a nose plug; or just breathe normally.
Fifty per cent of people told to breathe normally or through their mouths yawned while watching other people yawn, while none of those told to breathe through their noses yawned. The researchers also found that subjects who held a cold pack to their forehead did not catch yawns from the film, while those who held a warm or room-temperature pack yawned normally (Evolutionary Psychology, vol 5, p 92).