Which structure is connected to the dural mater of the spinal cord?

The denticulate ligaments are primarily responsible for anchoring the spinal cord to the dural mater, which is the outermost layer of the meninges surrounding the spinal cord. These ligaments are triangular extensions of the pia mater that attach along the length of the spinal cord and help to secure it within the vertebral canal. By connecting the spinal cord to the dural mater, the denticulate ligaments play a crucial role in stabilizing the position of the spinal cord and preventing excessive movement, which is essential for the protection of spinal cord structures.

In contrast, the other structures listed do not serve this specific anchoring function. The pia mater is the innermost layer of the meninges and lies directly on the surface of the spinal cord. The arachnoid mater is positioned between the pia mater and the dural mater, forming a protective layer but does not provide direct attachment to the spinal cord. Lastly, the central canal contains cerebrospinal fluid and is a feature of the spinal cord's internal anatomy but does not have any structural connections to the dural mater. Thus, the unique role of the denticulate ligaments in connecting to the dural mater distinguishes them as the correct answer.