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Seasonal Affective Disorder Paper

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Relationship between Light Therapy and Seasonal Affective Disorder (SAD)
Seasonal affective disorder (SAD) is best characterized as a mild depression that typically lasts for a season. This type of depression usually occurs during the fall and winter months, which tends to disappear throughout the rest of the year. The disorder was initially introduced in the DSM-IV in 1994, identified as a depression disorder with a seasonal pattern (Rosenthal & Rosenthal, 2006). Furthermore, the symptoms of SAD are very similar to major depression, but varies in severity. According to the American Psychology Association (2015), “symptoms include fatigue, pervasively sad mood, loss of interest, sleep difficulty or excessive sleeping, craving and eating more …show more content…

Due to the reduced daylight time frame within the fall and winter months along with the reduced sunshine light throughout the day, the light has potential to affect the optimal mood in a person’s behavior pattern (Partonen & Lonnqvist, 2002). Although researchers have concluded to various theories explaining the relationship between SAD and light, yet the majority have agreed that there is a significant relationship between sunshine light and the circadian cycle. Considering the rhythmic biological cycle as a main factor in SAD, one study states the amount of the hormone melatonin produced in one’s brain is probably the best index of circadian timing (Arendt, 2012). In addition, there has been additional evidence of phase delay in the timing of circadian rhythms in SAD patients as well (Partonen & Lonnqvist, 2002). According to Moscovici (2006), it is assumed “that the decrease in daylight exposure affects circadian rhythms via the retinal-hypothalamic pathways and the suprachiasmatic nucleus, the endogenous body clock, and the melatonin secretion through the pineal gland, subsequently affecting serotonin metabolism in such a way that it causes the kind of mood alterations seen in SAD.” Therefore, researchers in the clinical community began implementing light therapy to treat their SAD …show more content…

The light box is a highly designed fixture that exposes artificial light. Mayo Clinic (2015) has confirmed the light box is well designed, safe and effective; however, not approved or regulated by the Food and Drug Administration. According to Peters (2015), “The light box generates a standard wavelength and amount of light. The light provided is toward the red end of the color spectrum.” In most cases, the intensity of the bright light has ranged from 2,500 lux to 10,000 lux depending of the size of the room. The purpose of the light box is to mimic natural outdoor light; which is assumed to affect the brain chemicals liked to a person’s mood and lessen their SAD symptoms by resetting their circadian rhythm. Therefore this current research is to investigate the relationship between light therapy and seasonal affective disorder (SAD) in a clinical trial that included a randomized placebo group as well. Specifically, I hypothesized that the light therapy of 2,500 lux will lessen the symptoms of

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