I am glad that you are discussing the tremor. For me, it is the worst part of BFS; the most difficult symptom to deal with. Further, this is the only symptom that is getting worse with time. The other symptoms (fasciculation, myoclonia, paresthesia) come and go, but I don’t think that they are getting worse. 1. Shaking part: Most bad at left arm. Whole body.It started on my left arm. If I leaned against something with my hand (with a bended elbow), the muscles started to shake. After that, two fingers on the left hand started to “dance” just like in the video by christinasgirl123. It bothers me when I use the keyboard. Now, both arms shake when I keep them straight (postural tremor). The legs and the jaw entered the game two weeks ago. If I keep one feet of the ground, the leg starts to shake. Sometimes my teeth chatter. If I press my front teeth together, I can feel the fine vibration of the jaw. 2. Did it happen before the onset of first twitch (if yes, does it exacerbate a lot after the onset)I did not have tremor before BFS. My first symptom of BFS was fasciculation in the palm of my left hand, then left arm (Sept/2011). The tremor in my left arm became noticeable in Nov/2011. Myoclonia was very intense in the first 3 months.3. When do you feel the shakiness? (at rest/maintain certain gesture/after exercise...)I have “postural tremor”. It is gone at rest. If I keep my arms raised in the level of my chest, they shake. If I open my fingers, the forearm and the fingers shake. If I lift a foot, the leg shakes. If I hold something heavy under my arm for some minutes, the arm is useless afterwards because the tremor is intensified. Same works with the hand/fingers. I am afraid of doing exercise to see how bad it gets. The tremor gets a lot worse on emotional situations (stress, anxiety, scare, anger, insecurity etc). 4. Any comment:- I also have “ratcheting” of the muscles. It is most obvious when I close my hand and swing my fist up and down. The muscles in my forearm clearly vibrate instead of doing a smooth movement. I wonder if this is what they can “kinetic tremor”. - I tried primidone for the tremor, but quit after 5 days because I felt very dizzy in the morning, as if I was drunk. Didn’t notice change in the tremor in these 5 days. - Sometimes, when I wake up in the middle of the night, I feel my whole body, or parts of it, vibrating. It is a very strange feeling. Besides, the “ratcheting” is more intense.