What Causes Insomnia Along With Sporadic Feeling Of Electrical Impulse In Head?

I have severe problem s with falling asleep and staying asleep. In 1998 I had a very severe car accident with a very bad TBI. I m finding that I m having sporadic bouts with upper body jerks (associated with my head, back/neck and arm s/hand s) and during these bout t it s almost like I hear electrical impulses in both my head and and my ear s and right as it climaxes of the electrical impulse I jerk after I notice my head dips in a sitting position during the day while I m awake. I ve only had this happen twice at night but primarily it s during the day. My last sleep study showed I had a high increase of 84% in the beta wave activity of the sleep pattern. My sleep doctor tried to rule it off to my medications I ve been on for year s, however, I m not on any stimulants. It s been questioned if I m having absent seizures with myoclonic jerks, however, it s never been followed up by neurologists or sleep doctor s. It s becoming extremely bothersome because I can go for several day s without sleep. I ve had medical training and my primary doctor trusts my recommendations when it comes to lab s and test s, however, I m unsure what this is and what now to ask for so I m asking here.