Kinematics of the head and associated vertebral artery length changes during high-velocity, low-amplitude cervical spine manipulation

ConclusionsMean head angular displacements and VA length changes were small during CSM thrusts. Of the four different CSM measured, mean VA length changes were largest during rotation procedures. This suggests that if clinicians wish to limit VA length changes during the thrust phase of CSM, consideration should be given to the type of CSM used.
Source: Chiropractic and Manual Therapies - Category: Complementary Medicine Source Type: research