Terms:
ganglion - a collection of cell bodies located outside
the Central Nervous System. The spinal ganglia or
dorsal root ganglia contain the cell bodies of sensory
neurons entering the cord at that region.
tract - a group of fibers inside the CNS. The spinal
tracts carry information up or down the spinal cord,
to or from the brain. Tracts within the brain carry
information from one place to another within the
brain. Tracts are always part of white matter.