Nervous SystemSpinal Cord |
What are spinal cord tracts? |
Tracts are bundles of axons that are relatively uniform with respect to diameter, myelination, and conduction speed. All the axons within a tract relay the same type of information in the same direction.
When the body reacts to an outside stimulus without the involvement of the brain, it is called a spinal reflex arc. (From Premkumar K. The Massage Connection Anatomy and Physiology. Baltimore: Lippincott, Williams & Wilkins, 2004.)