Which option lists the components that form the borders of the spinal canal?

Which option lists the components that form the borders of the spinal canal?

• A. Body/Corpus; Pedicles (2); Laminae
• B. Pedicles (2); Laminae
• C. Body/Corpus
• D. All of the above

Answer: (A)

The borders of the spinal canal are formed by both the vertebral body in front and the vertebral arch behind and to the sides. The body provides the anterior boundary, while the arch elements—the pedicles and the laminae—construct the lateral and posterior walls. The pedicles connect the body to the arch and create the side walls, and the laminae complete the posterior roof of the canal. To enclose the canal, you need all three components together. If any one element is missing, the border is incomplete, which is why listing the body along with the pedicles and laminae gives the full set of borders. The other options leave out one of these essential parts, making them incomplete.

The borders of the spinal canal are formed by both the vertebral body in front and the vertebral arch behind and to the sides. The body provides the anterior boundary, while the arch elements—the pedicles and the laminae—construct the lateral and posterior walls. The pedicles connect the body to the arch and create the side walls, and the laminae complete the posterior roof of the canal. To enclose the canal, you need all three components together. If any one element is missing, the border is incomplete, which is why listing the body along with the pedicles and laminae gives the full set of borders. The other options leave out one of these essential parts, making them incomplete.