The statistical distribution of members of a population around the population mean. In a gaussian distribution, 68.2% of values fall within Â± 1 standard deviation (SD); 95.4% fall within Â± 2 SD of the mean; and 99.7% fall within Â± 3 SD of the mean. Synonym(s): bell-shaped curve, normal distribution.
Located on the bony extensions of the vertebrae, the surfaces of the facet joints fit together like a three-dimensional puzzle. In the spaces between vertebrae run the nerve rootsâexits off the spinal cord's information highway.
Facet Joints are innervated or supplied by nerves called medial branches. These nerves carry the pain signals to the spinal cord and the signals eventually reach the brain, where the pain is noticed.acet Joints are innervated or supplied by nerves called medial branches. These nerves carry the pain signals to the spinal cord and the signals eventually reach the brain, where the pain is noticed.