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 blocks are injections of anaesthetic and steroid around a nerve or group of nerves to reduce and numb pain. Different kinds of nerve blocks are used for different purposes. Therapeutic nerve blocks are used to treat painful conditions. They contain local anaesthetic that can be used to control acute pain.