====== Spinal nerve root ====== {{ ::spinalnerveroot.jpg?200|}} A spinal [[nerve root]], the beginning of one of the thirty-one pairs leaving the central nervous system from the [[spinal cord]]. Each [[spinal nerve]] root consists of the union of a sensory dorsal root and a motor ventral root. see [[Cervical root]] see [[Thoracic nerve root]] see [[Lumbar nerve root]]. see [[Sacral nerve root]]. [[Lumbar foraminal stenosis]] (LFS) is defined as when the [[spinal nerve root]]s are compressed on the side due to narrowing of the foramen that may be caused by a foraminal herniated disc, a collapsed disc space, or an enlarged joint.