What happens to the spinal cord at the level of the conus medullaris?

What happens to the spinal cord at the level of the conus medullaris?

• A. It expands into the cauda equina
• B. It ends abruptly
• C. It continues to the coccyx
• D. It bifurcates into two distinct pathways

Answer: (B)

The conus medullaris represents the terminal region of the spinal cord, typically located at the level of the first or second lumbar vertebra. At this site, the spinal cord does not continue; instead, it tapers and ends, transitioning into the filum terminale, which anchors the spinal cord to the coccyx. This anatomical characteristic is significant because it marks the final section of the spinal cord before it diverges into the nerve roots that form the cauda equina. Understanding this structure is crucial for identifying potential injury sites and their implications for neural function during surgical procedures. The definitive termination of the spinal cord at the conus medullaris is essential knowledge for clinicians involved in intraoperative monitoring and procedures involving the vertebral column.

The conus medullaris represents the terminal region of the spinal cord, typically located at the level of the first or second lumbar vertebra. At this site, the spinal cord does not continue; instead, it tapers and ends, transitioning into the filum terminale, which anchors the spinal cord to the coccyx. This anatomical characteristic is significant because it marks the final section of the spinal cord before it diverges into the nerve roots that form the cauda equina. Understanding this structure is crucial for identifying potential injury sites and their implications for neural function during surgical procedures. The definitive termination of the spinal cord at the conus medullaris is essential knowledge for clinicians involved in intraoperative monitoring and procedures involving the vertebral column.