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 Extrusion of the Disc. A paracentral disc herniation or extrusion is a disorder where the affecteddisc is herniating in direction of the central section of the spinal canal, also called foramen (thatâs where the nerve roots as well as the spine cord pass).
Intervertebral Disc Protrusion. An intervertebral disc protrusion is another diagnostic term for a herniated disc. Protrusion is a term usually reserved for significant disc bulges, in which the herniation extends past the normal boundaries of the vertebral bones. Most protrusions are not problematic and might even shrink back considerably on their own.