The term used to describe a main nerve trunk as it arises from the spinal canal. It soon divides into a number of branches, some of which join with other nerve roots and go on to supply various parts of the body including muscle groups (myotomes) and specific areas of skin (dermatomes).
where the main nerves of the body leave the spinal cord and pass out of the spinal canal through the intervertebral foramen, where they then feed through the body either anteriorly (motor nerves) or posteriorly (sensory nerves). The anterior divisions supply the front of the spine including the limbs. The posterior divisions are distributed to the muscles behind the spine.
This is the portion of the nerve that comes off of the spinal cord and exits the vertebral canal (spinal canal) through a root foramen or hole in the bone.