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94 m a s s a g e & b o d y w o r k j a n u a r y / f e b r u a r y 2 0 1 9 technique MYOSKELETAL ALIGNMENT TECHNIQUES Bones as Levers Tips to Treat Back Contractures and Spasm By Erik Dalton, PhD 1 Manual therapists routinely use bones as levers to reduce tension and protective spasm in hypertonic muscles. For example, the femur and humerus are excellent tools for stretching tight hip and shoulder girdle muscles, and we commonly rotate and sidebend a client's head to relieve neck tension. However, I've noticed in workshops that therapists are sometimes uncomfortable applying direct pressure to the spine to help relieve back spasm. I feel this is a missing piece in many therapeutic interventions. Here, I'll explain the benefits and application of bones- as-levers myoskeletal techniques designed to ease back pain. FOCUS ON FACETS Notice in Image 1 how the deep transversospinalis (groove) muscles encase the spine with some branches spanning only a single vertebral segment. These short lever muscles are loaded with sensory receptors that alert the brain of undue stress or instability. My mentor, the late Dr. neighboring chemoreceptors. The spine's neuronal pool can typically handle one or the other, but not both. Combined mechanoreceptor and chemoreceptor stimuli may force activation of danger-signaling nociceptors. These fast- track information to the brain, warning of the possibility of tissue damage. The brain often won't release the spasm until normal facet joint movement is restored. This leads us to the burning question: How are we to relieve this spasticity when we are unable to palpate the tiny transversospinalis muscles with our fingers? The first thing that probably comes to mind is to try to stretch the spine in an effort to relieve the spasm and joint fixation. This approach frequently falls short, as neighboring joints stretch "around" Philip Greenman, past director at Michigan State University College of Osteopathic Medicine, referred to these spinal groove muscles as "dynamic ligaments" and claimed their primary function was to protect and stabilize the spine, not to move it. No matter how we view their intended function, it's clear the rotatores, multifidi, and intertransversarii are acutely sensitive to disruptions in normal facet joint movement. Let's take a look at how these spinal joints should move, then observe what happens when normal motion is lost. The illustration in Image 2 shows how facet joints of the superior vertebra are designed to glide open on their inferior neighbor during forward bending and smoothly back as the spine straightens into extension. Likewise, during sidebending and rotational movements, the facets on one side will close as the opposing side opens, allowing us the flexibility to carry out daily twisting and bending. Not surprisingly, this normal opening and closing motion is often altered in aging or abused spines due to facet cartilage degradation and reactive muscle spasm. For example, Image 3 demonstrates how a hypercontracted intertransversarii muscle on the right prevents the joint from completely opening during forward bending. Can you picture how it would also cause the transverse process on the right to rotate posteriorly? Try this with a plastic spine. When muscle, ligament, and joint capsule mechanoreceptors are exposed to this type of sustained jamming, they react by flooding the spinal cord's neuronal pool with warnings of physiologic distress. In some cases, prolonged mechanical tension due to overuse, trauma, and suboptimal posture will escalate into a full-blown inflammatory response that triggers Transversospinalis (groove) muscles.

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