do you ever have convulsions when you get depressed? ive noticed when i get really sad and depressed i must remain standing or sitting up. the reason is that if i lie down i will start shaking and convulsing uncontrollably. this is lessened when i lie on my back but not much. my abs start contracting and relaxing uncontrollably just as they do when i lie on my stomach, but since i am on my back i dont curl up into the fetal position.