The presidential primary system has a rich and interesting history in American politics. From the nominations by caucus, in the days of the Founding Fathers, to the most recent contests, we have seen the electoral process go through a dramatic change.
Usually a nerve root block is only carried out when other methods of treatment have tried and failed and any nerve root that is blocked, will have been the most likely originator of pain. The procedure is not undertaken on each particular nerve.
Nerve block. The nerve block is a physiological test that determines whether the patient's pain is mediated by the targeted nerve, i.e. one or more of the medial branches of the dorsal rami that innervate the posterior elements of the cervical spine including the intervertebral discs, the zygapophyseal joints, and the posterior neck muscles.