Twisting of the dural
Common symptoms associated with a Category I pelvic rotation:
Category II Subluxation: Sacral iliac ligaments stretch allowing the sacral iliac joint to separate. This hypermobility of the sacral iliac articulation results in postural distortions: the sacrum slips (tilts) to one side resulting in a functional leg length discrepancy; the spine unbalances and the head tilts to one side.
Classical postural distortional patterns associated with a Category II subluxation:
Category II, Pattern I: Head tilts left, shoulder drops to the right, the pelvis (sacrum and both innominates) tilts left
Pattern II (functionally short left leg): This pattern can reach the level of the foot resulting in foot twist (supinated left foot - pronated right foot)
Common symptoms associated with a Category II Subluxation:
Muscles that typically are in spasm:
Category III Subluxation: the sacral iliac ligaments are torn, allowing a greater separation within the weight bearing SI Joint. This results in degenerative changes within the spinal intervertebral discs.
Common symptoms associated with a Category III Subluxation:
Typical body lean patterns seen with a Category I-III Subluxations:
Category II, Pattern II: Head tilts right, shoulder drops to the left, the pelvis (sacrum and both innominates) tilts right
Pattern I (functionally short right leg): This pattern can reach the level of the foot resulting in foot twist (supinated right foot - pronated left foot)
Three Categories of Sacral Occipital Lesions (courtesy of: Howat J. Chiropractic: The Anatomy and Physiology of Sacro Occipital Technique).
If there is a structural block preventing the normal extension/flexion between the occiput and sacrum, the following subluxations (postural distortions) can result:
Category I Subluxation (typically seen in pediatric patients): a misalignment of the innominates on the sacrum in which one innominate is more anteriorly rotated relative to the ipsilateral innominate (referred to as the sacral boot mechanism):
This patient has a mixed postural distortional pattern: PreClinical Clubfoot Deformity and a Category II, Pattern II Cranial Sacral Subluxation. The interactions between the two postural distortional patterns result in a skewed postural shift (e.g., in a pure Cat II, P II Subluxation, the pelvic would be tilted to the right).
Cranial Sacral Theory - Its' Link to Postural Distortions