The Dorsals are usually considered in three groups. It must be remembered that the form and obliquity of spinous processes vary considerably in this region. The upper processes are very slightly oblique, slanting downward, the middle Dorsals very oblique, and the inferior ones again only slightly so. There is a form change, most commonly at the eighth Dorsal, which may be mistaken for a posterior subluxation. The process here becomes more horizontal and more blunt. Among the first four Dorsals a bad lateral or rotated vertebra may be listed as well as a posterior one, since we can readily adjust it. In the middle group either the posterior or rotated vertebra is chosen according to the estimate as to which causes greatest nerve impingement, either being adjustable. In the lower group, however, preference is usually given the posterior vertebra when possible, because rotary subluxations indicate transverse adjustments and it is somewhat dangerous in this region to use the transverses as levers. Lumbar Palpation The Lumbars and Sacrum are considered in one group. The Lumbars, with patient erect, _should_ curve anteriorly and the first Sacral spinous process should complete the regular curve. This is rarely found, however; the normal is the exception in any part of the spine. In the Lumbars we usually choose the rotated rather than the posterior vertebra, but solely because rotation here produces the greatest degree of impingement. The laterality of spinous processes, indicating rotation of the whole vertebra around an axis lying in the transverse line between the articular processes, can best be perceived, as a rule, with patient sitting quite erect. If in doubt, have patient lean forward and rest elbows on knees, which posture separates the Lumbars, rendering the individual spinous process easier to discover but the _relative_ position more difficult of determination. The fifth Lumbar, if anterior, may be so listed, forming an exception to the general rule. Sacral Palpation--Pelvis First palpate Sacrum as if part of Lumbar region. Note whether the base (upper portion) is posterior or not. Then stand behind the patient and use both hands to examine the sacroiliac articulations. Use palmar surfaces with the flat hand toward patient’s body, and carefully compare the two sides to detect inequalities, which indicate iliac subluxation, or rotation of Sacrum between the ilia on a transversely disposed axis passing through the two articulations, in which case the Sacrum is to be adjusted. Do not mistake a dislocated hip with compensatory tilting of the whole pelvis, or faulty sitting posture with only one tuber ischii supporting the body, for pelvic subluxation. Be not in undue haste to record pelvic subluxations lest your haste bring its immediate reward in the difficulty of adjustment. The Coccyx