What is the connection of the dura to the vertebral column?

What is the connection of the dura to the vertebral column?

• A. The dura is firmly attached to the vertebral periosteum along the spine.
• B. The dura-periosteum connection in the cranial cavity cannot occur in the vertebral column due to curvature.
• C. The dura is not connected to bone anywhere.
• D. The dura forms tight attachments with nerve roots only.

Answer: (B)

In the spinal canal, the dura mater forms the dural sac that surrounds the spinal cord and sits in an epidural space filled with fat and the internal vertebral venous plexus. This means it is not directly attached to the vertebral bone along most of the spine. The cranial dura, by contrast, is tightly adherent to the inner surface of the skull bones via the periosteal layer. Because the spinal dura is separated from bone by the epidural space, a dural connection to vertebral periosteum along the length of the spine doesn’t occur. That’s why the statement about a dura–periosteum connection in the vertebral column is not possible despite the cranial situation. So the best answer reflects that distinction: the dura–periosteum connection seen in the cranium cannot occur in the vertebral column. The other ideas aren’t correct because the spinal dura is not firmly attached to vertebral bone along the spine, the cranial dura is connected to bone, and the dura around nerve roots is not its only attachment and it isn’t limited to those roots.

In the spinal canal, the dura mater forms the dural sac that surrounds the spinal cord and sits in an epidural space filled with fat and the internal vertebral venous plexus. This means it is not directly attached to the vertebral bone along most of the spine. The cranial dura, by contrast, is tightly adherent to the inner surface of the skull bones via the periosteal layer. Because the spinal dura is separated from bone by the epidural space, a dural connection to vertebral periosteum along the length of the spine doesn’t occur. That’s why the statement about a dura–periosteum connection in the vertebral column is not possible despite the cranial situation.

So the best answer reflects that distinction: the dura–periosteum connection seen in the cranium cannot occur in the vertebral column. The other ideas aren’t correct because the spinal dura is not firmly attached to vertebral bone along the spine, the cranial dura is connected to bone, and the dura around nerve roots is not its only attachment and it isn’t limited to those roots.