Blood tests and a physical exam point to a serotonin/dopamine imbalance (probably set off by 4 months of no sunshine whatsoever!)The rods and cones in your eyes must have full spectrum light to absorb enough Vitamin D to keep those chemicals in balance. X certainly didn't help the matter. Neither did a family history of mood disorder (probably why this happened to him and not me). Doc says the chances of it being more serious (Parkinson's, tumor, thyroid, etc.) are very, very slim (that second "very" made me feel SO much better, I can't tell you!)She put my husband on 10 mg. of Paxil daily and wants to wait three months to see if the symptoms abate. She thought an MRI/CAT was unnecsarry at this point. He is also healing spritually by meditating for 20-30 minutes daily. I taught him a Buddhist vipassana where rather than just follow the rise and fall of the breath, you start to explore the inner demons-negativity, pride, ego, pain, fear, etc. Once you befriend them, it is easier to let them go. We also got a "light box" (cost $300) that you can set by the computer or where you meditate. You sit in front of it for 30-60 minutes each day so you can absorb full-spectrum light (regardless of what you have heard, tanning beds are NOT the right answer here!). He's used it for a week and swears he feels better. His handwriting is shaky and he's still twitchy and sleeping poorly, but the depression hasn't been crippling. I suspect he is simply relieved that he sin't going to die anytime soon (once he courted these thoughts, it was hard to pull himself out of the quagmire of negativity). Let me know what happens with you. I'll keep you in my positive thoughts.