The major descending spinal tracts send axons from the brain that travel through the _________________ and _________________ columns of the spinal cord.

Use a search engine to research a specific example of a chemical, brand, and generic names of a medication. You must include all three to earn the question points.  Include the website link at the end of your written response. Use a credible source. Wikipedia and Artificial Intelligence (AI) are not acceptable. 

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