This is a great picture I found that shows the structure and division of the spinal cord, along with all of its functions. Its very clear and simple - making it very easy to learn for nclex. And heres a tip for you - Ive seen many nclex practice questions that focus on Spinal Cord Injury affecting C1-4, which affect breathing.
Superior view of the brain revealing the visual pathway and superior sagittal sinus. Electrical nerve impulses travel from the eyes to the occipital lobe in the back of the brain via millions of nerves fibers that make up the visual pathway.