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Psychological Properties Of Ya
Beginning of paper
Studies on the physical and wning
The act of yawning has been observed in all vertebrates, and occurs in humans as early as minutes after birth, so it must have some definitive physiological purpose. Until recently, most scientists believed yawning was a respiratory function, triggered by a surplus of carbon dioxide in the bloodstream. In the pa ....
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....ance, the second trial measured heart rate, and the third trial used an electromyogram with electrodes attached to the subjects’ masseter muscles to verify that they were yawning when they said they were. Each subject was alone in a room for the course of all three trials. In addition, a control group of 20 students were tested for skin con.... |
| Word count: 2211 |
Page count: 9 |
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