In the early 20th century the SI joint was thought to be the main source of law back pain and was the focus of many scientific investigations. But recently two newest theories have been developed.
First, the theory of rotational malalignment known today as the Malalignment Syndrome which includes: SI joint upslip/downslip (superior/inferior shear), sacral torsion (hip anterior/posterior rotation), hip outflare/inflare (lateral/medial rotation), (Schamberger, 2002, 2006). Diagnosis of these syndromes is very straight forward, as is the treatment of each is
Second, the past 15 years, a well-known group of PTs, have been developing a newer theory that is known as the Joint-By-Joint Approach. This theory is based on understanding the primary role of the different major joints.
Of course all joints need a combination of mobility and stability, but interestingly, each joint displays a predominant need for either mobility or stability.
Lets start from the bottom which joint require mobility or stability…..
Ankles – mobility
Knees – stability
Hips – mobility
Lumbar Spine – stability
Thoracic Spine – mobility
Scapulae – stability
Shoulders – mobility
Cervical Spine (C7-C3) – stability
Cervical Spine (C2, C1) – mobility
Our CNS chooses mobility over stability depending on when we move. Another prospective , when a joint which predominantly requires mobility, reaches its mobility barrier ( it may be physiological or pathological), the surrounding joint will give up their stability to accomplish the mobility requirement. This is involuntary survival technique that is controlled by CNS.
How this above phenomenon will work with Hip and Spine lets understand.
Register to read full text