Basion | Radiology Reference Article - Radiopaedia. org The basion is the median (midline) point of the anterior margin of the foramen magnum The apical ligament attaches to it It is one of the skull landmarks, craniometric points for radiological or anthropological skull measurement
Basion - e-Anatomy - IMAIOS Basion is located at the middle of the front edge of the foramen magnum This specific point is an important craniometric landmark used in radiological measurements of the skull to identify conditions such as basilar invagination and atlanto-occipital dissociation
Occipitocervical Instability - Spine - Orthobullets Acquired instability is treated with observation or occipitocervical fusion depending on the presence of neurologic deficits intrinsic ligaments are located within the spinal canal and provide most of the ligamentous stability They include:
Craniocervical Measurements – Radiology. World The basion-dens interval is the distance between the tip of the clivus and dens (red line) A basion-dens distance of >12 mm on radiographs and >8 5 mm on CT is suggestive of craniocervical instability
Basion-dens interval (BDI) - Spine and Brain Advocate The basion-dens interval (BDI) is the distance between two points in your neck: the basion and the tip of the dens Doctors use this measurement to check for injuries in the neck area The basion is a point at the base of your skull, and the dens is a projection of a bone in your neck
McRae line | Radiology Reference Article | Radiopaedia. org McRae line is a radiographic line drawn on a lateral skull radiograph or on a midsagittal section of CT or MRI that connects the anterior and posterior margins of the foramen magnum (basion to opisthion)