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Here, you will find basic information about the patterns of the Sphenobasilar Mechanism (SBM) as it moves around its axes of movement. You should be familiar with the information in this post about the SBS, Axes, and Quadrants. The Spheobasilar Synchondrosis (SBS) is the center of craniosacral motility in the biomechanical model. Accordingly, these are called SBS patterns.
This post discusses the motions of the
As discussed in this post about craniosacral motility, the craniosacral system ebbs and flows through flexion and extension. So, flexion and extension are opposing patterns. Patterns are named for what is the opposite of the restriction. Accordingly, when the system is restricted as it flexes, we say that it has an extension pattern – even if it doesn’t extend well. Yeah, it seems odd, but it is true. When the sphenobasilar is restricted into left torsion, we say that we have a right torsion pattern. You’ll get used to it. Maybe. As for now, this is the convention and how we’ll talk about the SBS patterns.
There is another point. The pattern is also named after the movement of the inferior aspect of the sphenoid base near the SBS. During flexion, at that point, the joint is easily seen as flexing. In other words, that side of the SBM is decreasing in its angle. In Left Torsion, that aspect turns to the left. In Inferior Vertical Strain, that aspect moves inferiorly. This will make more sense as you learn about those patterns.
You might want to have this post on axes and quadrants open in another window.
Keep in mind that the patterns are named for what happens at the anterior basilar portion of the sphenoid. For example:
The descriptions below show and describe how to initiate the pattern with a fronto-occipital hold.
In this pattern:
In this pattern:
In this pattern:
In this pattern:
In this pattern
In this pattern:
Rotation, which occurs on the A to P axis, typically happens at the far end of side-bending. So, it is explained with side-bending under the motions of the vertical axes.
In this pattern:
In this pattern:
At a point during side-bending, the SBS mechanism will rotate back to the right.
At a point during side-bending, the SBS mechanism will rotate back to the left.
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Tony Preston has a practice in Atlanta, Georgia, where he sees clients. He has written materials and instructed classes since the mid-90s. This includes anatomy, trigger points, cranial, and neuromuscular.
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