Copyright © Philip M. Parker, INSEAD. Terms of Use.

| Domain | Definition |
Health | A syndrome characterized by depressions that recur annually at the same time each year, usually during the winter months. Other symptoms include anxiety, irritability, decreased energy, increased appetite (carbohydrate cravings), increased duration of sleep, and weight gain. SAD (seasonal affective disorder) can be treated by daily exposure to bright artificial lights (phototherapy), during the season of recurrence. (references) |
Medicine | Psychiatric disease caused by shorter days and longer nights, due to the reaction of the pineal gland to reduced sunlight. Source: European Union. (references) |
| Psychiatric disease known as the "winter blues"; is caused by shorter days and longer nights; due to the reaction of the pineal gland to reduced sunlight. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | |
(From Wikipedia, the free Encyclopedia)
It is believed that SAD is related to a lack of serotonin and that exposure to wide-spectrum artificial light may improve the condition by stimulating seratonin production. Light therapy appears to be effective in treating SAD, but the exact mechanism of the effect is still unknown.
One recent trial seemed to indicate that shining a bright light behind the sufferers' knees would be beneficial, but when the trial was duplicated on a larger scale, the results were negative.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Seasonal affective disorder."
| Domain | Title |
Books |
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Source: compiled by the editor from various references; see credits. | |
Expression using "SEASONAL AFFECTIVE DISORDER": Seasonal affective disorder (SAD). Additional references. | |
| Source: compiled by the editor from various references; see credits. |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
seasonal affective disorder | 233 |
seasonal affective disorder light | 4 |
seasonal affective disorder sad | 3 |
depression seasonal affective disorder | 3 |
seasonal affective disorder light therapy | 2 |
seasonal affective disorder treatment | 2 |
| Source: compiled by the editor from various references; see credits. | |
| Language | Translations for "SEASONAL AFFECTIVE DISORDER"; alternative meanings/domain in parentheses. | ||||||||||
French | trouble affectif saisonnier, dépression saisonnière, dépression de l'hiver. (various references) | ||||||||||
German | jahreszeitlich bedingte mentale Störung. (various references) | ||||||||||
Pig Latin | easonalsay affectiveay isorderday depressão sazonal (winter blues), depressão periódica (winter blues). (various references) | ||||||||||
| 1. Usage: Commercial 2. Expressions 3. Expressions: Internet 4. Translations: Modern | 5. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.