Neurology Lab 2 - Module 1 - Vertebral Column: Page 3 of 5

View the vertebral column.

Using the Highlight tool, now highlight the lumbar vertebrae one by one and note their orientation and anatomical relationships on the transverse, sagittal and coronal cross-sections.

	At what vertebral level does the spinal cord end in an adult?
Typically, the spinal cords ends around the L1-L2 vertebral level in an adult. At birth, the spinal cord typically ends around the L3 vertebral level.

	Why are the spaces between the posterior aspects of the L2, L3, L4, and L5 vertebrae clinically important?
These spaces (especially L3/L4 and L4/L5) provide safe access to the subarachnoid space for procedures like lumbar puncture and spinal anesthesia.

Compare the lumbar vertebrae to the thoracic and cervical vertebrae.

	Sports involving repeated lumbar extension combined with rotation, such as gymnastics or diving, increase the risk of fracture to what anatomic structure?
The pars interarticularis. The pars (part) interarticularis (between the articular processes) is a small segment of vertebral bone connecting the superior articular process to the ipsilateral (on the same side) inferior articular process. On an oblique lumbar X-ray, this is the "neck" of the Scottie dog.