This issue of Neurosurgery Clinics, guest edited by Dr. Domagoj Coric, provides an Update on Motion Preservation Technologies. This issue is one of four selected each year by our series consulting editors, Drs. Russell R. Lonser and Daniel K. Resnick. This issue discusses state-of-the-art indications, technique, devices, complications and evidence basis for motion preserving technologies in the cervical and lumbar spines. Topics covered in this issue will include: Cervical Total Disc Replacement: Indications and Technique, Cervical Total Disc Replacement: Off-label and Expanded Indications, Cervical Total Disc Replacement: FDA-approved Devices, Cervical Total Disc Replacement: Novel Devices, Cervical Spine Surgery: Arthroplasty versus Fusion versus Posterior Foraminotomy, Cervical Total Disc Replacement: Complications and Complication Avoidance, Cervical Total Disc Replacement: Long-term Outcomes, Biomechanics of Cervical Arthroplasty Devices, Adjacent-level Disease following Spinal Arthroplasty, Lumbar Total Disc Replacement: Current Usage, and Posterior Lumbar Facet Replacement and Arthroplasty.