Environment and physiology – Seasonal Affective Disorder

For those of us in the Northern hemisphere, this is a highly relevant topic at this time of year. Seasonal Affective Disorder is is a type of depression that's related to changes in seasons and the accompanying decrease in natural daylight.  It is a very good example of an interaction between the environment and a physiological process. This blog by Dayna Evans carries an excellent description of her suffering from SAD. Rosenthal et al (1986) summarised a series of studies and concluded ...