4th lumbar vertebra level

This tutorial covers the cross-sectional anatomy at the level of the 4th lumbar vertebra (L4). It begins with an overview of body planes and orientation in cross-sectional images, similar to CT and MRI scans. The tutorial then identifies muscles, organs, nervous structures, arteries, and veins visible at the L4 level. It also discusses the clinical relevance of these structures, particularly in the context of CT colonography for detecting colon cancer. The session concludes with a review of the key anatomical features discussed.

Discuss the organs located at the L4 level.

What is the cauda equina and its significance at the L4 level?

Describe the major arteries and veins identified at the L4 level.

What is CT colonography and its relevance to the L4 level?