The most cephalad denticulate ligaments attach intracranially. They are located just posterior to the vertebral artery and the ventral rootlets of C1 and anterior to the branches of the posterior spinal artery, spinal accessory nerve and, dorsal rootlets of C1.
The dentate ligaments get denser in the lower thoracic spine and tend to attach to the dura mater closer to the exiting nerve roots compared to those of the cervical and upper thoracic spine.
The most caudal of the denticulate ligaments merge with the pia mater surrounding the filum terminale.
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