How to Beat Seasonal Affective Disorder With Tech

In times of darkness, sometimes you have to create your own light — sometimes even literally. Though scientists and doctors aren’t totally sure of the cause of Seasonal Affective Disorder, evidence suggests that it could have something to do with the way our bodies respond to light, more specifically, sunlight.

In the winter months the hours of sunlight dwindle and the nights grow longer, meaning less vitamin D. Affecting our body in ways from bone growth to immune functions, vitamin D is one of the most essential; and when we don’t get enough of it, frequent illness, fatigue, and depression can follow. Furthermore, light’s interactions with the brain are even more complicated; Intrinsically Photosensitive Retinal Ganglion Cells, shortened to ipRGCs, signal non-image-forming effects in response to environmental light. In simpler terms, this regulates our pupil reflexes to changing light, natural circadian rhythms, our energy level, and mood. Individuals suffering from symptoms of SAD appear to be linked with the diminished sunlight hours of the winter months, resulting in lowered activation of ipRGCs or abnormal signaling.

Our response to light and sunlight, however, are just the tip of the iceberg when it comes to understanding the causes, symptoms, and even treatments for Seasonal Affective Disorder. This infographic details the unique effects of SAD, continuing research for treatments, and why technology is on our side.