During the initial discovery period of global climate change, the magnitude of the influence of the Sun on Earth's climate was not well understood. Since the early 1990s, however, extensive research was put into determining what role, if any, the Sun has in global warming or climate change.
Paracentral Herniating Disc. A paracentral herniation occurs when the bulge of the affected intervertebral disc points in direction of the middle part of the spinal canal, also called the foramen. The word âparacentralâ originates from the Greek and means ânear the centerâ of something.
1 The most common location for a herniated disc to occur is in the disc at the level between the fourth and fifth lumbar vertebrae in the low back. 2  If the disc herniation is large enough, the disc tissue can press on the adjacent spinal nerves that exit the spine at the level of the disc herniation. Abnormal rupture of the central portion of the disc is referred to as a disc herniation. 2  The most common location for a herniated disc to occur is in the disc at the level between the fourth and fifth lumbar vertebrae in the low back.