2010 Spine Control Symposium Recap: Part 3

On Saturday, August 28, 2010, I had the privilege of attending the spine control symposium put forth by the University of Queensland's Centre of Clinical Research Excellence in Spinal Pain, Injury & Health. This was a must symposium for all professionals in the rehabilitation injury who manage low back pain and with the constant growth and debate pertaining to the research in this field, I am truly thankful for such an opportunity to expand my knowledge. As such, I also believe that it is my responsibility to relay that information onto my colleagues and will make an attempt to do so below.

Note: Please click here for Part 2
Please be aware that the following information is based on my interpretation of each lecture and therefore, may be subject to "lost in translation".

'Clinical Update: Emerging trends in exercise management of spinal pain'  ~ Paul Hodges & Stuart McGill

This lecture was the meat and potatoes of the symposium. Dr. Hodges was the main presenter and often asked Dr. McGill to provide some practical insight into some of his interventions for low back pain. While they both stressed that they were likely very similar in their approach to spinal care, it was evident from this talk that the divergence is still glaring. In fact, even the miracle blade could not cut the tension in the air although both were very professional in their "debate".

Here are my notes:

Basic principles:

• Dynamic control far exceeds static control
• The system as a whole is what's important, not a single muscle
• The biopsychosocial framework must be considered during intervention
• The assessment is highly important
• The principles are drawn from multiple approaches in training

5 basic but key components to DYNAMIC CONTROL:

• Posture
• Movement
• Underactivity (tends to involve local structures)
• Overactivity (tends to be global structures)
• Evaluation of both provocative and relieving factors

Treatment Goals:

• Postural correction
• Movement correction
• Muscle Activation Optimization

Posture:
Dr. McGill gave an example of the importance of posture and its relationship with our breathing. Feel free to perform a self-assessment in the various positions

• Regular sitting - normal breath
• Slouched – breath goes directly to mid-chest level
• Military position (shoulder retraction, thoracic extension) – breath goes down to base of lungs
• Rotate and list to one side – one lung becomes compromised and breath is taken up by contralateral lung

Movement:
Dr. McGill also provided us with a movement correction example

• Upright stance and muscle activity
• A forward posture (slouched or neck protraction) vs neutral spine
• Bottom line: change posture during movement may change activity of lumbar musculature (i.e. extensors)

*All three (posture, movement, muscle activation optimization) are important but we as clinicians have to figure out which of these is our priority in treatment."

"STATIC STABILITY DOES NOT EQUAL FUNCTION"

Interplay between dynamic and stiffness:

• This is a continuum
• Depends on the load (high load requires high stiffness)
• Depends on the movement (greater movement requires greater dynamic control)
• Depends on the predictability (low predictability requires high stiffness)
• We need to find the right balance!

"Change in motor control is about looking at the whole system not the parts."

Common features of motor control strategies:

Dr. McGill on posture correction:

• First try to achieve elastic equilibrium
  • First start with a position of least load / stress concentration
• Then try to modulate that with pain
  • Can be standing
  • Can be seated
  • This seated example touched upon correct posture. Rather than actively extending the thoracic spine (which increases extensor muscle activity), tilting the pelvis anteriorly is preferred

Preservation of feedback control may be via taping:

• I found this to be quite interesting in light of the various taping techniques currently on utilized in the rehabilitation and sport medicine settings
• Taping may also be used for modifying muscle activation strategies

"NEUTRAL SPINE IS NOT STATIC!"

• It needs to be variable…and within the functional range

"The gluteus maximus is a (free) knee extensor!"

• When standing, active contraction of this muscle passively extends the knee
• "Spread the floor and use the hips"
• This is advantageous as it unloads the quadriceps muscle

Activating the HIGH glutes & glute med:

• Needs core stiffness
• Externally rotate hips
• This may be done actively and reactively (minibands around the knees and around the feet)

Activating LOW glutes:

• Only achieved in a deep squat position

Posture and Movement is about load:

• How does pain change with the addition and removal of load?
• McGill  - "tolerance is a function of posture and movement"

McGill on Bracing:

• Become a dimmer switch not a light bulb
• Its all about tuning!

​Hodges: There’s a difference between just making a muscle active (Transversus Abdominis) vs an optimal way of using the muscle:

• It's not enough just to activate the muscle…you have to learn how to use it!

Hodges: 

“There is no doubt that Stu and I have differing positions on the role of the deep muscles in the clinical approach but I think it is good that we have different ideas because all individuals patients are different.”

"The Transversus Abdominis is not the most important thing in low back pain but our data show that it is the most consistent deficit in low back pain presentation. Therefore it is important to address this muscle as part of the comprehensive package of treating low back pain."

"Improving the activation of the deep muscles may decrease the over activity of the global/superficial muscles."

Dr. McGill on the Transversus Abdominis:

• He understands that the TrA is important. His problem is that there are so many other important aspects to low back pain patients.
• ...and far too often the patients that he sees are “paralyzed” by the concept of a dysfunctional TrA. They are always asking, "is my TrA working?", "why isn't my TrA working?"
• This is why he subscribes to the method of external focus for motor learning by Gabrielle Wulf.

Dr. Hodges:

• Counters that there is data to show that simply an internal focus to “wake the muscle up” is ok. As long as there are subsequently more functional goals to focus on

*In my opinion, It’s an apples vs oranges debate!"

"Train movement control, posture and muscle activity during rehabilitation"

• If they flex the spine while bending forward then train them not to flex the spine while bending forward.
• Its that simple! :)

Dr. McGill: 
“Fix the biggest things first to get them out of pain...THEN fine tune!"

• This was his rebuttal to the TrA and MF controversy. He states that he has never encountered a patient where the TrA deficit was the most significant dysfunction

Dr. Hodges’ strategy of multifidus activation:

• Can you turn it on?
• What else happens when you turn it on?
• Do you have control over the strategies?
• Most important and effective strategy is to use imagery.

"There’s something about attention to detail that’s driving changes in neuroplasticity"

Dr. McGill:

• States that his athletes cannot individually activate muscles medial to lateral but they can superiorly and inferiorly
• BUT THE MENTAL FOCUS WAS IDEAL!!!

Dr. Hodges:

"Delays are significant in a motor system."

• This deficit is NOT the dysfunction but only a window of opportunity to look into the system.

As mentioned earlier, this turned out to be an interesting and enlightening high tension academic debate but both experts argue that it would be most valuable to have a patient on hand to both assess to really truly get an idea of how each think. They agreed that this would truly provide valuable insight into the magnitude of their agreement/disagreement.  Out of all of this, they state that there is mostly convergence between the two and that it may be the last (5%)...i.e. their specific methods...that may be different.

"Divergence is healthy. Because if not, what would drive research?"

*The purpose of everything is the individualized goals of each patient. That’s it!