If you’ve ever been to a chiropractor, you may have heard a loud “pop” sound during your adjustment. This sound is often associated with the relief of pain and improved mobility. However, have you ever stopped to wonder what causes the “pop”? In this article, we’ll explore the science behind chiropractic adjustments and the infamous “pop” sound.
Chiropractic adjustments are a form of manual therapy used to treat musculoskeletal conditions, such as back pain, neck pain, and headaches. They involve the application of a controlled force to a joint to improve its range of motion and reduce pain. During an adjustment, a chiropractor may use their hands or a small instrument to apply a quick, thrusting motion to the joint.
One of the most distinctive features of a chiropractic adjustment is the “pop” sound that often accompanies it. This sound is similar to the crack you might hear when you crack your knuckles. However, the “pop” sound during a chiropractic adjustment is louder, which can be alarming to some patients.
The Science Behind the "Pop" - Air Bubbles and Joint Cavitation
The “pop” sound during a chiropractic adjustment is the result of a phenomenon called joint cavitation. Joint cavitation occurs when a sudden change in pressure within a joint causes gasses, such as nitrogen and carbon dioxide, to be released from the synovial fluid that surrounds the joint.
When a chiropractor applies a quick, thrusting motion to a joint, it creates a sudden drop in pressure within the joint. This drop in pressure causes gasses to rapidly leave the synovial fluid, creating a popping sound. The “pop” sound is not an indicator of the success of the adjustment, but rather a byproduct of the joint cavitation process.
The release of gasses from synovial fluid during joint cavitation has been studied extensively. Researchers have found that the “pop” sound is the result of the collapse of a gas-filled cavity within the joint. When the joint is adjusted, the sudden drop in pressure causes the cavity to collapse rapidly, creating a popping sound.
High Velocity Low Amplitude (HVLA) Adjustments vs. Other Techniques
There are several different techniques that chiropractors can use to adjust their patients. One of the most common techniques is high velocity low amplitude (HVLA) adjustments. This technique involves a quick, thrusting motion to the joint, which often results in the “pop” sound.
Other techniques, such as mobilization, involve a slower, more gentle approach to joint manipulation. Mobilization techniques may not result in the “pop” sound, but they can still be effective in improving joint function and reducing pain.
The choice of technique will depend on the patient’s individual needs and preferences, as well as the chiropractor’s training.
Chiropractors often emphasise the importance of specific adjustments, which target a particular joint or area of the body.
Specific adjustments can be tailored to the individual patient’s needs, and can help to improve joint function and reduce pain. However, specific adjustments may also be more uncomfortable for the patient, due to the amount of dysfunction and potential of inflammation in that area.
Common Misconceptions About Chiropractic Adjustments
There are several common misconceptions about chiropractic adjustments that can be misleading for patients. One of the most common misconceptions is that the “pop” sound is an indicator of the success of the adjustment. As we’ve discussed earlier, the “pop” sound is simply a byproduct of joint cavitation and is not an indicator of the success of the adjustment.
Another misconception is that chiropractic adjustments are dangerous or can cause harm. While there are some risks associated with chiropractic care, these risks are rare and can be minimized with proper training and technique. A chiropractor will conduct a thorough examination to diagnose the underlying cause of your issue before any adjustment is delivered.
Chiropractic care can be an effective treatment for a variety of musculoskeletal conditions, such as back pain, neck pain, and headaches. Understanding the science behind chiropractic adjustments can help to demystify the process and make patients more comfortable with the treatment.
While the “pop” sound may be the most distinctive feature of a chiropractic adjustment, it’s important to remember that it’s not an indicator of the success of the treatment. Chiropractors use a variety of techniques to improve joint function and reduce pain, and the choice of technique will depend on the patient’s individual needs and preferences.