Seasonal Affective Disorder (SAD) is a form of clinical depression that comes and goes in a seasonal pattern. It’s also referred to as “winter depression,” because that’s usually the time when symptoms become more pronounced and noticeable. The lack of sunlight during the winter months is thought to contribute to symptoms of SAD including loss of energy, mild depression, oversleeping, overeating and carbohydrate cravings. Many people with SAD have a delayed circadian rhythm — they fall asleep and wake up too late.
Brain scans show cause of seasonal affective disorder
Scientists say they have identified the underlying reason why some people are prone to the winter blues, or seasonal affective disorder (SAD). People with Sad have an unhelpful way of controlling the "happy" brain signalling compound serotonin during winter months, brain scans reveal. As the nights draw in, production of a transporter protein ramps up in Sad, lowering available serotonin. The work will be presented this week at a neuropsychopharmacology conference. The University of Copenhagen researchers who carried out the trial say their findings confirm what others have suspected - although they only studied 11 people with Sad and 23 healthy volunteers for comparison. Using positron emission tomography (PET)Memory
Seasonal Affective Disorder .Every year, as the days get shorter and the weather gets , colder millions of people (particularly in the northern climates) are affected by a condition known as SAD or Seasonal Affective Disorder. About a third have the actual SAD, as it is clinically defined, while the rest can be lumped into the winter blues category, which many of us can identify with.
Natural light and Tryptophan
There are many theories as to why this condition exists and trying to isolate a single causal factor is unlikely. Many feel that SAD is likely due to an imbalance of the neurotransmitters melatonin and erotonin. Production of b