In the third case, the patient has symptoms of nerve entrapment at one of the osteofibrous tunnels but demonstrates no discernable pathology in the osteofibrous tunnels or the nerves within. MRI examination is done for more detailed assessment of the osteofibrous tunnel. This is combined with nerve conduction studies for the evaluation of the nerves from the cervical roots to the hand to exclude intrinsic pathology of the nerve or a possible focal disease somewhere else along its course. These options illustrate a change in the focus of nerve entrapments at the osteofibrous tunnels diagnosis from Nerve Conduction studies to ultrasound. With ultrasound, there are no needles piercing the muscle, and certainly no voltage is used to shock the patient.