Circadian Rhythms

Paper Summary:

The paper defines circadian rhythms as what has allowed human beings to adapt to the 24-hour cycle that makes up day and night in this world. The paper examines how the brain and environment regulate circadian rhythms. The paper looks at why people sleep and the various factors that affect how much time people are asleep and awake.

From the Paper:

"In this manner, our circadian rhythm gives our brain a real biological clock, that genetically gives us a checkpoint and outline for when to act and when to be inactive. This occurs because of an even more minute biological instance. These SCN neurons that we have discussed and defined "link to the tiny pineal gland, which secretes melatonin, a hormone that has a relaxing effect on the body" (Atkinson et al., 2003, p. 211). What occurs in this biological exchange is that during the day, the pineal gland is more dormant and relaxed and then, conversely, during the nighttime, "SCN neurons are inactive, allowing melatonin levels to increase and promoting relaxation and sleepiness" (Atkinson et al., 2003, p. 211). Thus, the brain has adapted and evolved to a night-and day-setup that the human body has enacted upon it."

Sample of Sources Used:

• Atkinson, M.L., Mitchell, J.B., Muir, D.W., Passer, M.W., & Smith, R.E. (2003). Psychology frontiers and applications (2nd ed.). Canada: McGraw-Hill Ryerson Limited.

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