Ethernet now commonly uses a star topology,although this is rather unfavorable when it comes to system wiring and canlead to excessive cabling effort or highly cascaded communication depend-encies.Another factor is that not all Ethernet installations are identical.
A cervical selective nerve block is an injection designed to help relieve neck pain, shoulder pain, and/or arm pain caused by a pinched nerve or nerves in the cervical spine.
Animated at right: Open MR injection for confirmation of the diagnosis of axillary nerve entrapment syndrome. Pain and weakness in the shoulder is often due to a shoulder joint injury or to rotator cuff syndrome-an injury in which the muscles and ligaments around the joint are weakened or torn.