In 1972, Rosenzweig et al. conducted an experiment with mice to explore the effect that environment has on the size of the brain. Rosenzweig structured the experiment by having three different sets of mice, each with a different environment. The first set, was the control in the study, in which there were a number of mice with food and water. The second set of mice were in the impoverished set in which a single rat was with food and water, and the last set of mice, was the enriched set in which there were a number of mice, water food and different exercise machines and toys for the mice. At the end of the study when they looked at the brain size of the mice from each of the three sets, the ones in the enriched set had the thickest and heaviest cerebral cortices. They also found that the same set of mice had an increased activity of enzyme acytlcholinesterase, also that they had larger neurons and a greater RNA to DNA ratio, which is important for cell growth. Therefore, this experiment w...
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...o blue light at night can also have some positive effects on our physiological process. Dr. Cajochen reported that subjects who were exposed to blue light scored higher on memory and cognition tests. Approximately only half the time, men where able to recall paired words which were flashed across a fluorescent light, while scored raised to almost 70% when the paired words were flashed though LED monitors.
In conclusion, scientists Rosenzweig and Brainard came close to proving that the environment you are living in can in fact, have effects on our physiological process. While on the other hand, scientist Olson showed that there are extraneous factors, which can alter the studies results, and Dr. Cajochen showed how exposure of blue light does not only have negative effects on us, but there can be some positive effects such as an increase in memory and cognition.
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