Seasonal Affect Disorder

idk what it is recently, but my minds been a roller coaster. maintaining concentration on school is fine...its more of recurrent thinking that has been occurring. I could diagnose myself with seasonal affect disorder as easy as I had diagnosed the one girl from the previous weekend (all i heard was that she doesn’t drink beer --> celiac disease).  I find it so fascinating how the mind works--i should say brain rather.  What I think is so crazy about it is that in 99% of people the other organs of the body do exactly the same thing as everybody else on this planet--the kidney, the liver, the GI tract are all the same in everyone.  The brain however is completely different.  It's so malleable depending on so many factors that we don't and probably will not completely understand ever.  I was in the pediatric emergency room today and evaluated a bunch of patients, one being a recent change in behavior due to a big stressor in the family.  What is also amazing is that there is somethings that seem constant with the brain between people. When huge stressors occur in people, a depressive mode kicks in, in most people.  Euphoria also occurs in everyone with very similar experiences that cause the euphoria.  With these diseases that we consider psychiatric, medicine still has yet to find concrete answers to why they occur (a lot of diseases outside the brain are almost 100% figured out).  It's amazing how the brain acts and turns directions so quickly--its almost as if there is some constant defense mechanism, not disorder, in which why the brain does what it does.  In dissociative identity disorder (as lay people know as multiple personality disorder) I believe the brain uses a survival mechanism to turn one person into another so the original person doesn't remember any constant harsh environments they are in (usually the disorder is triggered by a constant abuse that never lets up). Maybe autism isn't a disease, but more of an adaptation to life--maybe for some reason the brain decides that it doesn't need to talk and interact with people as much as it once used to; maybe this great new age of technological advances has somehow played a role in this adaptation.  I really don't know, but what I can say is that the brain is amazing.  Thinking about how we know all about the neurotransmitters that make up the brain, but don't fully understand how their interaction makes people so diverse to different situations, is phenomenal.  Maybe one day we'll understand, but for now I'll take a look on the bright side, because I know things that have occurred to me in my short life, made me a better person I am today, and am glad that I can look beyond things that happen to me and force my brain out of a situation that would be disconcerting to my life.  To make light of this kind of serious topic, I wanted to let you all know that the all beloved Sacha Baron Cohen has a cousin who is one of the pioneers of autism research. Find his wiki link here: Simon Baron-Cohen