Traction is the controlled stretching, lengthening and realignment of the spine. a Using moderate pressure, traction pulls the vertebrae of the spine up and apart, to increase space between them, help relieve direct nerve pressure and reduce stress on the vertebral discs.
Cervical, or upper back traction is a common nonsurgical treatment for a herniated disc in the neck that relieves pain by opening up the cervical foramen to reduce pressure on the compressed nerve roots exiting the spinal canal.