Musculoskeletal Diagnostic Ultrasound (DU) is a powerful tool that can be utilized by Physical Therapists to identify tendonopathies. Furthermore, DU can be utilized with Dry Needling in order to visualize the needle which has been shown to significanlty improve the accuracy of the user to target the affected area compared to relying solely on palpation and anatomical landmarks.
A brief review of the "active" phase in running mechanics
The first installment in our running mechanics series discussed the importance of stability and striking your support leg under your hips. This Pose position will allow the runner to absorb forces more readily and prepare more efficiently for the next movement. The next movement in the Pose Method is the Fall. The purpose of this phase is to increase speed and since the Pose Method is all about “effortless running,” optimal body alignment will allow gravity to do the brunt force of the work.
The Pose Method of running allows one to identify and promote a running form that maximizes gravity along with the body’s effort and stored energy (elasticity) to create efficient movement. In essence, it makes running easier and less physically stressful to the body. There is a lot of debate surrounding running form. Some even question if it’s necessary to promote a particular way of running. However, it is a universally accepted foundation that every activity has a “best practice” - from changing a tire to playing basketball to cooking. As able-bodied individuals, we are all physically capable of performing such activities, but how long it will take to complete? How many unnecessary steps do we take? How much additional effort and load do we put on our bodies mentally and physically? These questions can be addressed by learning and PRACTICING ideal mechanics. Sure, you can go out on a 1-mile run in a recommended shoe to begin your fitness journey but would you start your golf journey on the tee box of Hole 1 with your newly purchased clubs? No, likely you would work with a knowledgeable person on how to hold the club, general swing mechanics and practice several range balls before venturing to the course. Why should running be any different? Particularly in a sport where “novice” runners have a much higher risk of running related injuries (RRI) compared to experienced runners. In a study completed in 2018, authors found a 2x-injury rate in novice runners compared to experienced runners over a 4-yr period. Secondly, running is the cornerstone of several other sports so as you go out to shoot 100 free throws every day to practice your form, why wouldn’t you add drills to improve the form of getting from Point A to Point B on the court? It makes sense to make use of the studies on running form and body mechanics to begin a new fitness goal in order to give us an advantage - how many YouTube videos do you watch before endeavoring to fix the washing machine? Knowledge is power. The Pose Method works by identifying repetitive “poses” during a running cycle through which every runner must pass: they have been described as Pose (the typical running “picture”), Pull and Fall. For the next few weeks, we will be breaking down each phase. We will start with “the Pose.”
Have you been told you need to stretch? Do you know how to stretch? Do you know how long to stretch? Let Evolution Sports guide you through these questions!
Medial Hop testing may better measure for safe return to sport participation following and ACL repair.
In our previous blog post, we highlighted the peripheral mechanisms of dry needling into muscle tissue. The benefits of trigger point dry needling have been well documented in the literature. However, this is only one component of needling in the treatment of neuro-muscular dysfunction. A comprehensive definition of dry needling should include nerves, ligaments, tendons, scar tissue, bone and teno-osseus junctions.1 This requires expanding beyond the trigger point model to consider additional peripheral, spinal and supraspinal mechanisms. The classic local twitch response is thought to be a strong neural impulse triggered from needling into multiple sensitize loci. Mirror local twitch responses have been recorded in the opposite trapezius muscle during dry needling of the symptomatic trapezius. This example suggests a consideration of central mechanisms in addition to local muscle dysfunction.1 A brief review of pain physiology is helpful in consideration of central dry needling mechanisms. Pain sensation originates in peripheral nociceptors that continue into sensory fibers, which feed into the central nervous system through the dorsal horn of the spinal cord.2 After connecting with spinal neurons, the pathway continues up the spinothalamic and spinoreticulothalamic tracts. These lead to supraspinal locations including the thalamus, parabrachial nucleus and amygdala. There is significant potential for both dysfunction and pain relief within this neural system.2 Throughout this discussion, the terms acupuncture and dry needling will be used interchangeably.1 While many studies use the term “dry needling,” others commonly use terms including TrP acupuncture, acupuncture needling and electroacupuncture. Several studies have used acupuncture and dry needling in the same title. All of these cases meet the strict definition of “dry needling”. This trend of discussing dry needling as acupuncture is commonly seen in the UK, Canada, USA and Germany.1 Acupuncture randomized control trials and other studies have commonly used western medical diagnoses including neck pain, knee osteoarthritis and plantar fasciitis.1 Furthermore, these studies applied needles into “Ah-Shi points,” which is Chinese for “auwh that’s where it hurts” or “that’s it.” These are synonymous with trigger points and are used in combination with non-trigger point targets. In this sense, it is beneficial for physical therapists to recognize the findings of appropriate biomedical acupuncture research.1 Studies have demonstrated that electroacupuncture involves many different mechanisms and bioactive substances, both peripherally and centrally for pain conditions.3 Peripheral release of endogenous opioids originate from lymphocytes, monocytes/macrophages and granulocytes. Sympathetic nerve fibers are additionally activated for opioid response. These opioids activate receptors on peripheral nerve terminals to decrease pain signaling back to spinal and supraspinal structures.3 Electroacupuncture has been shown to inhibit the sensory component of pain through spinal mechanisms including opioids, serotonin, norephinephrine and glutamate.3 Spinal opioid receptors are targeted to inhibit thermal hyperalgesia and mechanical pain thresholds. Low and high frequency electroacupuncture have been found to inhibit thermal pain during acute pain. Thermal, mechanical and spontaneous pain are inhibited in persistent pain conditions. Electroacupuncture influence on opioid receptors is thought to occur on both presynaptic primary afferent fibers and postsynaptic dorsal horn neurons.3 Electroacupuncture studies have also confirmed the involvement of spinal serotonin and norephinephrine in pain inhibition.3 This includes serotonin-containing nucleus raphe magnus neurons and norepinephrine-containing locus coeruleus neurons. Electroacupuncture also decreases glutamate receptor activity and induces release of spinal norepinephrine, which each inhibit pain signals at the spinal level. Pain reduction has also been noted with changes in glial cells, cytokines, signal molecules/pathways, dopamine and acetylcholine at the spinal level.3 Electroacupuncture benefits via supraspinal mechanisms have been noted with the contribution of many nuclei.3 Sensory components are mediated via nucleus raphe magnus, periaqueductal gray, locus coeruleus, arcuate, preoptic area, nucleus submedius, habenular, accumbens, caudate, septal area and amygdala. Opioid activity in the arcuate-periaqueductal gray-nucleus raphe magnus-spinal dorsal horn pathway are thought to be particularly important in this sensory realm. Several studies have shown that endorphin release blocks affective pain responses while controlling for sensory pain inhibition. This selective supraspinal influence on affective and sensory components of pain is a similar consideration for drug efficacy in pain management, including the use of morphine.3 The physical therapists at Evolution Sports Physiotherapy have been trained in a variety of needling techniques to meet the individual needs of our patients. Our comprehensive treatment approach respects localized tissue dysfunction in addition to central considerations based on clinical findings and assessment. Please contact us with any questions concerning dry needling and treatment options. References: 1. Dunning J et al. Dry needling: a literature review with implications for clinical practice guidelines. Physical Therapy Reviews 19(4):252-265, 2014 2. Cagnie B et al. Physiologic effects of dry needling. Curr Pain Headache Rep. 17:348, 2013. 3. Zhang R et al. Mechanisms of acupuncture- electroacupuncture on persistent pain. Anesthesiology. 120:482-503, 2014.
This is probably the most common question asked by patients when dry needling is presented to them as a viable treatment option. The answer to this question is multifaceted. In this post, I will review the peripheral indications and effects of dry needling and will break down and discuss multiple attributes of the treatment. Dry needling is much more than simply inserting an acupuncture needle into a painful trigger point, tight muscular knot, or muscle spasm. Before we understand how the needle itself effects healing and pain levels, it is important to understand the body’s mechanisms that allow these conditions to form in the first place. Trigger points, or knots, can form for a variety of reasons to include acute trauma, repetitive micro-trauma, overuse, and stress. All of these conditions elicit an inflammatory healing response from the body, which creates compression of local blood vessels and decreases circulation and oxygen delivery to the area. This impaired circulation combined with the increased metabolic demands of the hypertonic muscle leads to the depletion of Adenosine Triphosphate (ATP), the cells energy source used to fuel metabolic processes. The “energy crisis” created via the decrease in available ATP creates compensations at the neuromuscular end plate, both pre- and post-synaptically . Pre-synaptically, in the nerve terminal, ATP is directly responsible for the inhibition of acetylcholine (ACh) release. Acetylcholine is a neurotransmitter used at the motor end plate to elicit a muscle’s action potential and therefore a muscle contraction. The depletion of ATP perpetuates the release of ACh, thus perpetuating a muscle contraction in an already hypertonic muscle. Post-synaptically, ATP fuels the calcium (Ca2+) pump, which is responsible for maintaining the electrochemical gradient required to signal skeletal muscle cells to contract. The calcium pump is utilized by opening to allow a stimulus signal to pass and thus allow Ca2+ to flood they cytosol, but also to immediately pump ca2+ out of the cytosol when muscle activation is no longer required. The depletion of ATP mentioned above allows these channels to remain open, therefore, the muscles continually receive the signal to contract. Both of these actions compound upon one another to create a vicious cycle of muscle hypertonicity. When the increased metabolic demands of the hypertonic muscle cell are not met, the cells begin to panic and essentially yell for help. This is achieved by releasing algogenic chemicals such as bradykinins, cytokines, serotonin, histamine, potassium, prostaglandins, leukotrienes, somatostatins, and substance P in order to activiate local nocicepors, to elicit a healing response from the body. Thus, we have the development of a trigger point and the subsequent tenderness and pain associated with it. The effects of prolonged exposure to algogenic substances have been shown to lead to demyelination of local nerves and abnormal nociceptive impulses, which perpetuate the pain cycle. One of the key components of the dry needling treatment is often the aim of eliciting a “twitch response” by inserting the needle directly into a trigger point and tapping onto a sensitive loci. Although this effect is not required for a successful dry needling treatment it is a key component in clearing the excessive build up of ACh from the synaptic cleft and returning the motor end plate to a homeostatic state. Needle manipulation also plays a key role in the effects of dry needling. Multiple techniques are used to achieve a variety of goals. The techniques of pistoning or fanning of the needle are often utilized to create microtrauma and to elicit twitch responses by tapping onto multiple sensitive loci in the desired area. Periosteal pecking is a technique often used at the teno-osseous junction to achieve small amounts of bleeding and microtrauma to a tendon that normally has very little blood supply, in order to elicit a healing response. This technique is performed by a series of rapid tapping motions through the tendon and onto a bony backdrop. Lastly, the needle manipulation technique of twisting the needle has been shown to have numerous effects on local tissues as well as pain relieving properties. Of all of the techniques discussed, only rotation of the needle has been shown to definitively change the appearance of the local connective tissue surrounding the insertion point. Marked thickening of the subcutaneous connective tissue along with deformation of the extracellular matrix have been observed in tissue samples taken after dry needling treatments with needle rotation. Deformation of the extracellular matrix is believed to signal therapeutic effects via the alignment of collagen fibers and fibroblasts. This technique has also been shown to be the only technique that elicits an endogenous opioid release creating true pain reduction from the treatment. If you have any further questions about Dry Needling or feel you could benefit from this treatment technique, please contact Morgan or call our office to speak with one of the therapists at 410-628-0820. Stay tuned for our next newsletter where we will discuss the impact of Dry Needling on the Central Nervous System. References Chu, J. "Does EMG (dry needling) reduce myofascial pain symptoms due to cervical nerve root irritation?." Electromyography and clinical neurophysiology 37.5 (1997): 259-272. Chu, Jennifer. "Twitch-obtaining intramuscular stimulation: observations in the management of radiculopathic chronic low back pain." Journal of Musculoskelatal Pain 7.4 (1999): 131-146. Langevin, Helene M., David L. Churchill, and Marilyn J. Cipolla. "Mechanical signaling through connective tissue: a mechanism for the therapeutic effect of acupuncture." The FASEB Journal 15.12 (2001): 2275-2282. http://www.acupmedvet.com/artigos%20cient%C3%ADficos/Langevin%20et%20al.,%202001b.pdf Langevin, Helene M., David L. Churchill, and Marilyn J. Cipolla. "Mechanical signaling through connective tissue: a mechanism for the therapeutic effect of acupuncture." The FASEB Journal 15.12 (2001): 2275-2282. http://jap.physiology.org/content/91/6/2471.short Langevin, Helene M., et al. "Dynamic fibroblast cytoskeletal response to subcutaneous tissue stretch ex vivo and in vivo." American Journal of Physiology-Cell Physiology 288.3 (2005): C747-C756. http://ajpcell.physiology.org/content/288/3/C747.short Langevin, Helene M., et al. "Subcutaneous tissue fibroblast cytoskeletal remodeling induced by acupuncture: Evidence for a mechanotransductionâbased mechanism." Journal of cellular physiology 207.3 (2006): 767-774. Shah, Jay P., et al. "Biochemicals associated with pain and inflammation are elevated in sites near to and remote from active myofascial trigger points." Archives of physical medicine and rehabilitation 89.1 (2008): 16-23. http://triggerpoint-tutorial.com/pdf/Shah_Biological_milieu_of_MTP.pdf
Evolution Sports is Hosting the 2019 Olympic Lifting Camps on December 7th, 2019
Long Term Athletic Development for Adolescent and Younger Athletes
