Myelography is an x-ray examination of the spinal canal. A contrast agent is injected through a needle into the space around the spinal cord to display the spinal cord, spinal canal, and nerve roots on an x ray.he purpose of a myelogram is to evaluate the spinal cord and/or nerve roots for suspected compression. Pressure on these delicate structures causes pain or other symptoms. A myelogram is performed when precise detail about the spinal cord is needed to make a definitive diagnosis.
This is one of the only countries that doesnât touch the Pacific Plate. Instead it lies along the border of the Nazca and South American plates but is still considered to be part of the Ring of Fire. Chile records high levels of rainfall that add to earthquakes and tsunamis as natural disasters to be feared here. Chilean natural disasters include:
If earthquakes terrify you, then you may want to avoid Ecuador and the entire ring of fire. The US Geological survey glossary describes the Ring of Fire: The âRing of Fireâ, also called the Circum-Pacific belt, is the zone of earthquakes surrounding the Pacific Ocean â about 90% of the worldâs earthquakes occur there.uito, Ecuador, the site of many powerful earthquakes through the years, suffers one of its worst when a tremor kills 5,000 people and destroys some of the most famous buildings in South America, on this day in 1859.