Anatomical and functional perspectives of the cervical spine: Part II: the “hypermobile” cervical spine †.

This is the second of a three part series describing the clinical issues surrounding the radiographic assessment of the working definition of hypermobility. Described are the two major forms of hypermobility, namely generalized and segmental. Each form is reviewed and supported with available documentation. A case report is presented which highlights the clinical aspects of segmented hypermobility.