preview

Seasonal Affective Disorder: A Clear Link Between the Outside and the Inside of the Brain

Better Essays

Seasonal Affective Disorder: A Clear Link Between the Outside and the Inside of the Brain

And God said, Let there be light; And there was light.
And God saw that the light was good;
And God separated the light from the darkness.
God called the light Day, and the darkness he called Night.
And there was evening and there was morning, one day.
(Genesis 1:3-5) (1)

The sun has been an endless source of inspiration, both physical and spiritual, throughout the ages. For its light, warmth, and the essential role it has played in the maintenance of the fragile balance of life on earth, the sun has been honored and celebrated in most of the world's religions. While the regeneration of light is constant, the relative length of time …show more content…

Defining Seasonal Affective Disorder is somewhat more complicated than it may seem at first glance. It is generally thought to be a recurring fall/winter depression experienced by susceptible people, those with a lower threshold for light-associated depression. SAD affects approximately 35 million Americans, 10 million with the disorder and 25 million with subsyndromal SAD (8). While most people who live in northern latitudes tend to experience some mild depression symptoms related to seasonal changes, up to five or ten percent of the general population may be affected by one or more of the diagnostic symptoms of Seasonal Affective Disorder (6). There is a clear link between latitude (probably proportional to the amount of exposure to daily direct sunlight) and the susceptibility to Seasonal Affective Disorder. For example, in Florida, less than 1% of the general population is thought to be affected by SAD, while in Alaska, the percentage of affected people may be as high as 10% (7).

The major diagnostic symptoms related to SAD are recurring periods of depression and mood change throughout several years of seasonal changes. Other symptoms include nighttime carbohydrate craving (sugars, starches and alcohol) and weight gain, irritability and anxiety, an inability to focus, guilt, lethargy, hopelessness, suicidal thoughts and decreased sexual appetite (2, 3, 5, 7, 8, 9). Many of these symptoms are easily confused with

Get Access