Define nadir. nadir synonyms, nadir pronunciation, nadir translation, English dictionary definition of nadir. n. 1. Astronomy A point on the celestial sphere directly below the observer, diametrically opposite the zenith. 2. The lowest point: the nadir of their...
Annular tear â definition and causes. By Michael Perry, M.D. An annular tear is one of the most common degenerative spine conditions that develop with the natural aging process of the spine. In fact, many people over the age of 50 have an annular tear and never know it.
Annular Tear Overview. An annular tear â also known as an annular fissure â is a rupture or opening in the annulus fibrosus, the tough outer layer of the cushioning discs that sit between the bones in the spine.When the gel-like substance inside the disc leaks out, it can come in contact with spinal nerves and trigger pain.n annular tear can occur in the cervical spine, creating neck pain, and in the lumbar spine, creating pain or other sensations that may radiate down a single leg or both legs. The pain is often grows worse during lifting or bending motions, sneezing, coughing, sitting and standing.