What is the spinal cord?

The spinal cord is a compact bundle of nerves extending from the base of the brain down the spine. Diagram.

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Understanding Spinal Cord Injury: What you should know about spinal cord injury and recovery
This video uses simple language and images of real people who have sustained a spinal cord injury, as well as medical experts and advocates. Produced by Shepherd Center and KPKinteractive in collaboration with the American Trauma Society, the National Spinal Cord Injury Association and the Christopher & Dana Reeve Foundation.

Spinal Anatomy Center
Feature Articles and Video and Animation Directory from SpineUniverse provides patient and healthcare professional education, providing clear, straightforward information on conditions related to the spine, including degenerative disc disease, spinal stenosis, arthritis, fibromyalgia, and scoliosis.
 
Overview of the Nervous System
University of Texas Medical School at Houston developed this electronic course in neuroscience that features such as interactive graphics, animations, hyperlinks, computer-assisted interactive laboratories and interactive exam reviews. The material is designed for first-year medical students, but would also be appropriate for graduate students as well as advanced undergraduates. It has also been optimized to be accessible to individuals with various backgrounds in the neurosciences and different learning styles. Ideally, readers should have had college-level courses in physics, chemistry and biochemistry, and biology.

Spinal Cord and Spinal Nerve
Learning Modules - Medical Gross Anatomy from the University of Michigan Medical School.