What causes cervical compression dural sac

Cervical spondylosis in most cases is caused by disc herniation or even cervical posterior edge pyramid ossification, resulting in dural sac compression, dural sac it is a part of the dura mater, dural sac compression will cause headache dizziness, some people will cause neurological symptoms, unilateral or bilateral limb pain numbness, most people his dural compression causes most disc herniation, there are a small number of people are cervical posterior edge pyramid ossification, pyramid ossification caused.