Changes in the atlas-axis relations on lateral flexion of the head and neck.
D001368:Axis, Cervical Vertebra / Q000000981:diagnostic imaging / Q000502:physiology*; D001270:Cervical Atlas / Q000000981:diagnostic imaging / Q000502:physiology*; D006801:Humans; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology; D009333:Neck / Q000502:physiology*; D011187:Posture; D011859:Radiography; D012399:Rotation