Lewy Et Al: Study Review

Lewy et al (2006) study review Background This study was base by another study done by Avery et al. (2001). The study investigated the birth of melatonin levels in conjunction with quiet patterns and Seasonal affectional Disorder. Seasonal Affective Disorder is a type of depression that occurs in the beginning and ratiocination stages of winter, where the amount of daylight is shorter. This usually occurs in northern countries with colder climates, since the production of melatonin is triggered by lack of light. AimThe purpose of this study was to investigate the affinitys between melatonin, the eternal sleep cycle, and the time of melatonin release. Procedure The researchers conducted an experiment similar to Avery (2001). Participants with Seasonal Affective overthrow (SAD) was divided into four chemical groups dawn simulation therapy, traditional bright-light therapy, a tick off and a group given with low doses of melatonin at night. Results The researchers found that the sleep patterns and mood of the participants were significantly nobleer than the other groups, but not high enough to compare with the group receiving bright-light therapy.Therefore, it can be concluded that the bright-light therapy is more(prenominal) efficient in treatingSeasonal Affective disorder (SAD) than the other procedures (dawn simulation, group given low doses of melatonin at night. Discussion This study contributed to the understanding of the relationship between melatonin and the circadian rhythm (sleep-wake cycle). This can also be use to the concept of jet-lag, in which our bodies can adapt to another time geographical zone by making us sleep at specific times.