Vanessa, I've experienced both, and still do. My rsd is in both hands, my right arm, and the chest area on the right. I get muscle spasms in both hands that are so bad I literally SCREAM in pain. The jerking, well, lets just say I best not get too comfy with anything hot in my hands. Those come on when I relax. It's kind of similar to those jerks you get just before you fall asleep at night, only they happen when I'm AWAKE fully, but relaxed, and it happens in my arms and sometimes all over. I could do some major damage if someone is sitting too close. In fact, I HONEST TO GOD woke myself up last week cuz I punched myself in the face TWICE during a bout of those twitches. SERIOUSLY! No matter...it was time to get up anyway