“…2) A new type of subluxation has been defined in patients with complaints of persistent torticollis without radiologic abnormality of the atlanto-axial joint. 3) Atlanto-axial subluxation after infection of the upper respiratory tract is now designated as Grisel's syndrome, 8) but was first described in 1830, 1) and variously known as malum suboccipitale rheumaticum, distension luxation, Drehungsverrenkung, torticollis nasopharyngien, maladie de Grisel, non-traumatic subluxation, spontaneous hyperemic dislocation, inflammatory dislocation, dislocation nontraumatique, and le faux torticollis aigu. Grisel's syndrome manifests as painful head tilt (Cook-Robin look), Sudek's sign, and restricted neck movements due to torticollis.…”