tectorial membrane of atlanto-axial joint tectorial membrane of atlanto-axial joint the tectorial membrane of atlanto-axial joint (occipitoaxial ligaments) is situated within the vertebral canal. it represents the superior-ward prolongation of the posterior longitudinal ligament (the two being continuous). it attaches to the body of the axis before terminating superiorly by attaching onto the basilar part of occipital bone superior to the foramen magnum. tectorial membrane (axis)membrana tectoria, transverse, and alar ligaments. (membrana tectoria labeled at far left.)median sagittal section through the occipital bone and first three cervical vertebræ. (membrana tectoria labeled at left, second from top.)detailsidentifierslatinmembrana tectoriata98a03.2.04.007fma25013anatomical terminology anatomy d: tectorial membrane of atlanto-axial joint the tectorial membrane is a broad, strong band. it covers the dens of the axis and its ligaments. it is fixed, below, to the posterior surface of the body of the axis, and, expanding as it ascends, is attached to the basilar groove of the occipital bone, in front of the foramen magnum, where it blends with the cranial dura mater. relations its anterior surface is in relation with the transverse ligament of the atlas. the tectorial membrane is situated anterior to the spinal dura mater (which is firmly attached to the tectorial membrane).