Gonstead Chiropractic analysis and adjusting technique for lower cervical (C2 to C7) subluxations, and upper thoracic (T1 to T3: cervical chair only) subluxations. Cervical chair and prone adjusting techniques on the knee chest and Hylo tables are presented, including 3D videos for the key set-ups and hyperlinks to interactive 3D spin videos that allow 360 degree and zoom viewing of each adjusting set-up.