Sleep Study Lab Report with References

Sleep Study Lab Report with References - INTRODUCTION Many...

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INTRODUCTION Many people tend to feel of drowsy throughout the day even after four cups of coffee. Some suffer from sleep-depriving disorders such as insomnia and sleep apnea. Others simply just do not have enough time to get the recommended 8 hours of sleep needed per night to maintain a natural body temperature circadian rhythm. Circadian rhythm is the internal clock of the body (Golub, 2000). Hormonal and physiological functions and even brain signals all follow according to our circadian rhythms (Golub, 2000). Biological rhythms can be endogenous or exogenous. Endogenous (internal) biological rhythm is controlled internally with the temperature regularity, whereas the exogenous (external) cycle is controlled by the synchronization of the internal with certain external stimulation that could include anything from food, sunlight, to even social interaction. There are many different types of circadian rhythms. The word circadian is derived from a Latin phrase meaning “about a day” usually 24-hour period (Hedge, 2005). These rhythms tend to include sleep/wakefulness cycles, body temperature, metabolism, reproduction, blood pressure, enzymatic regulations, and much more. The biological clock is placed in the suprachiasmatic nuclei (SCN) and maintains the regulation of the each rhythmic activity. For example, the SCN clock makes certain that melatonin, a sleep-inducing hormone by the pineal gland, is secreted at specific times to orchestrate seasonal rhythms. Melatonin also happens to be the major factor in this experiment. Melatonin is produced within the pineal gland and is influenced by light intensity and has shown a
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certain synchronizing ability for circadian rhythms (Vera et al., 2004). Light intensity also becomes a factor when taking sleep-wake cycles into account for the experiment. Melatonin secretion is reserved by light exposure at night, which affects the sleep-wake cycles. (Cagnacci et al., 1991). This relationship can lead the assumption that when circulating levels of melatonin are in a higher range, then a decrease in body temperature will occur (Cagnacci et al., 1991). Assuming this to be correct, this experiment should show a decrease in the core body temperature with the added 1mg supplement of melatonin as opposed to the body temperature during the three controlled weeks. The objective of this experiment was to notice a difference in body temperature with the addition of melatonin supplements. This experiment included measuring oral temperature four times a day without any change, thus announcing the first three weeks of data as controlled data. The next three weeks included stimulation in the circadian rhythm by orally consuming 1 milligram of melatonin supplements, which were acquired over the counter at the local drug store, thirty minutes before bedtime. Body temperature was noted at four-hour intervals (7 AM, 11AM, 3PM, and 7PM) throughout the day. Among the data, estimated time of sleep was also noted.
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This note was uploaded on 04/09/2008 for the course BIO 103 taught by Professor Dean during the Winter '07 term at DePaul.

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Sleep Study Lab Report with References - INTRODUCTION Many...

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