['A patient with a suspected cervical spine injury may be at risk for secondary neurologic injury when initially placed and repositioned to the center of the spine board.', 'We sought to determine which centering adjustment best limits cervical spine movement and minimizes the chance for secondary injury.', 'Using five lightly embalmed cadaveric specimens with a created global instability at C5-C6, motion sensors were anchored to the anterior surface of the vertebral bodies. Three repositioning methods were used to center the cadavers on the spine board: horizontal slide, diagonal slide, and V-adjustment. An electromagnetic tracking device measured angular (degrees) and translation (millimeters) motions at the C5-C6 level during each of the three centering adjustments. The dependent variables were angular motion (flexion-extension, axial rotation, lateral flexion) and translational displacement (anteroposterior, axial, and medial-lateral).', 'The nonuniform condition produced significantly less flexion-extension than the uniform condition (p\xa0=\xa00.048). The horizontal slide adjustment produced less cervical flexion-extension (p\xa0=\xa00.015), lateral bending (p\xa0=\xa00.003), and axial rotation (p\xa0=\xa00.034) than the V-adjustment. Similarly, translation was significantly less with the horizontal adjustment than with the V-adjustment; medial-lateral (p\xa0=\xa00.017), axial (p\xa0<\xa00.001), and anteroposterior (p\xa0=\xa00.006).'] Does horizontal Slide create Less Cervical Motion When Centering an Injured Patient on a Spine Board?