dural sac

Introduction

A long tubular sheath within the vertebral canal.

• sac adheres to the margin of the foramen magnum, where it is continuous with the cranial dura mater
• sac is pierced by the spinal nerves & is anchored inferiorly to the coccyx by the terminal filum

More general terms

• spinal cord structure
• dura mater (pachymeninges)