Exploring Sphenobasilar Strain Stacking and Its Impact on Sacro-Occipital Technique

Understanding the complex relationship between the sacro-occipital technique (SOT) and the sphenobasilar symphysis is crucial for practitioners aiming to improve patient outcomes. The article by Blum and Curl, published in Chiropractic Technique in 1998, sheds light on how distortions in the SOT categories can be influenced by treating the sphenobasilar symphysis. This post explores the key concepts from Part Two of their work, focusing on the "Sphenobasilar Strain Stacking" technique and its role in addressing SOT distortions.

The Foundation: Continuities Within the Body

Before diving into strain stacking, it helps to recall the groundwork laid in Part One of the study. The authors emphasized the continuous connections between the central nervous system, its protective meninges, and the structural link between the cranium and pelvis. These connections form a dynamic system where tension or distortion in one area can affect distant regions.

This understanding sets the stage for why the sphenobasilar symphysis—a joint at the base of the skull where the sphenoid and occipital bones meet—plays a pivotal role in influencing sacro-occipital mechanics.

What Is Sphenobasilar Strain Stacking?

Sphenobasilar strain stacking refers to a method of addressing multiple overlapping strains or distortions at the sphenobasilar symphysis. These strains can accumulate or "stack," creating complex patterns of tension that contribute to dysfunction in the sacro-occipital region.

The technique involves carefully assessing and treating these stacked strains to restore balance and improve the function of the SOT categories. By targeting the sphenobasilar symphysis, practitioners can indirectly influence distortions that manifest in the pelvis and sacrum.

How Sphenobasilar Strain Stacking Affects SOT Distortions

SOT categorizes pelvic distortions into three main types, each associated with specific patterns of muscle imbalance and joint dysfunction:

• Category I: Posterior innominate rotation

• Category II: Anterior innominate rotation

• Category III: Bilateral sacroiliac dysfunction

  
  

Blum and Curl propose that treating the sphenobasilar symphysis through strain stacking can influence these categories by releasing tension patterns that propagate through the meninges and connective tissues. This approach can help correct the underlying causes of pelvic distortions rather than just addressing symptoms locally.

Practical Application of the Technique

The Sphenobasilar Strain Stacking technique requires a detailed assessment of cranial motion and strain patterns. Practitioners use palpation and specific manual adjustments to identify the presence and direction of strains at the sphenobasilar joint.

Once identified, the technique involves applying gentle, precise forces to counteract the stacked strains. This process may include:

• Sequential release of individual strain components

• Balancing cranial motion to restore normal joint mechanics

• Monitoring pelvic response to ensure that adjustments at the skull translate into improved sacro-occipital alignment

  
  

This method demands a nuanced understanding of cranial anatomy and biomechanics, as well as careful patient evaluation.

Benefits of Addressing Sphenobasilar Strain Stacking

By focusing on the sphenobasilar symphysis, practitioners can achieve several benefits:

• Improved pelvic alignment through indirect correction of sacro-occipital distortions

• Enhanced nervous system function by reducing meningeal tension

• Reduced compensatory muscle strain in the lower back and pelvis

• Potential relief of chronic pain related to pelvic and cranial imbalances

  
  

These outcomes highlight the importance of considering the body as an interconnected system rather than isolated parts.

Sphenobasilar Strain Case Example: Applying Strain Stacking in Practice

Consider a patient presenting with chronic lower back pain and pelvic asymmetry classified as Category I distortion. Traditional pelvic adjustments provide temporary relief but symptoms return quickly.

Using the Sphenobasilar Strain Stacking technique, the practitioner assesses cranial strains and identifies a complex pattern at the sphenobasilar symphysis. Through targeted cranial adjustments, the stacked strains are released, resulting in improved pelvic alignment and longer-lasting symptom relief.

This example illustrates how addressing cranial factors can enhance the effectiveness of sacro-occipital treatments.

Integrating Sphenobasilar Strain Stacking Into Clinical Practice

For chiropractors and manual therapists, incorporating this technique involves:

• Training in cranial assessment and manipulation

• Developing sensitivity to subtle strain patterns

• Collaborating with patients to monitor changes over time

• Combining strain stacking with other SOT protocols for comprehensive care

  
  

This holistic approach can deepen practitioners' ability to resolve complex musculoskeletal issues.

Blum CL, Curl DD, "The Relationship Between Sacro-Occipital Technique and Sphenobasilar Balance. Part Two: Sphenobasilar Strain Stacking," Chiropractic Technique, Aug 1998; 10(3): 101-107.

Part One assisted the reader in understanding various continuities within the body as they exist between the central nervous system and associated meninges and between the cranium and the pelvis.

Part Two postulates the SOT category distortions are affected when treating the sphenobasilar symphysis. The "Sphenobasilar Strain Stacking" technique is presented as a method of affecting SOT distortions.