I recently concluded that my tremor is an Isometric tremor and occurs whenever I tense any muscle in the body and is most notably seen whenever I make a fist. I have been seeing a neurologist and I have yet to be diagnosed. I also experience muscle spasms all over body, cracking all over body most notably in neck, numbness in hands/legs when lying down or sleeping which goes away after movement. Occasional light headed feeling, occasional pain throughout body, and just a general feeling of being unwell. This all started 6 months ago after an episode after leaving the gym and got into my car on a hot summer day and all of the sudden it was like a shock to my system I got out layed down on the grass and vomited. These have been the residual symptoms since that episode. I have seen numerous internists, 3 nuerologists including the recent one I have stayed with and no result thus far. Tests: Two MRI's of brain with and without contrast 3-t Machine, one C spine MRI without contrast, EMG and nerve conduction test, Heart echo, 24 h monitor, multiple ear nose and throat tests that only concluded a sinus infection at the time of the initial issue at the gym, EKG, EEG, Ultrasound of artery in neck, all the reflex tests that the Neuros typically do and various bloodwork for Lupus, thyroid, magnesium, ect.
Any ideas what the cause of Isometic tremors typically is?