COMLEX USA Practice Exam 2025 – The All-in-One Guide to Master the Comprehensive Osteopathic Medical Licensing Exam

Question: 1 / 400

Which vertebral range correlates with the upper part of the descending colon?

L1-L2

T10-T12

The upper part of the descending colon is primarily supplied by the left colic artery, which branches from the inferior mesenteric artery. The vertebral range that corresponds to the anatomy of the descending colon, particularly its upper part, is typically found between T10 and T12. This area reflects the spinal segments that are associated with the sympathetic innervation to the colon and the areas of referred pain in cases of colonic pathology. Additionally, the embryological development of the intestines and anatomical relationships further substantiate that the upper descending colon is situated within this thoracic range.

This understanding is critical when considering the referred pain patterns, vascular supply, and the sympathetic ganglia associated with the descending colon, aiding in the diagnosis and management of gastrointestinal conditions.

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T12

T8-T10

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