Radiologic evaluation of the function of the cervical spine.

Cervical functional examinations initiated in 1965 suggested the need of a correlated, multifactorial expression of the cervical sagittal movement function, allowing comparative evaluations of physiologic-diagnostic significance. Technical aspects of the successive steps of investigation, together with the final morphologic-functional formula are described. The significance of the normal and abnormal functional patterns, identified in a selected series of 300 cases, is finally discussed.