![]() ![]() It compared the joints of those who regularly cracked their knuckles to those who did not. ![]() A study published in 2011 examined the hand radiographs of 215 people (aged 50 to 89). The common claim that cracking one's knuckles causes arthritis is not supported by evidence. The snapping of tendons or scar tissue over a prominence (as in snapping hip syndrome) can also generate a loud snapping or popping sound. Due to the theoretical basis and lack of physical experimentation, the scientific community is still not fully convinced of this conclusion. The team concluded that the sound is caused by bubbles' collapse, and bubbles observed in the fluid are the result of a partial collapse. In 2018, a team in France created a mathematical simulation of what happens in a joint just before it cracks. In 2015, research showed that bubbles remained in the fluid after cracking, suggesting that the cracking sound was produced when the bubble within the joint was formed, not when it collapsed. There is some evidence that ligament laxity may be associated with an increased tendency to cavitate. The effects of this process will remain for a period of time known as the " refractory period", during which the joint cannot be "re-cracked", which lasts about twenty minutes, while the gases are slowly reabsorbed into the synovial fluid. The contents of the resultant gas bubble are thought to be mainly carbon dioxide, oxygen and nitrogen. In this low-pressure environment, some of the gases that are dissolved in the synovial fluid (which are naturally found in all bodily fluids) leave the solution, making a bubble, or cavity, which rapidly collapses upon itself, resulting in a "clicking" sound. When a spinal manipulation is performed, the applied force separates the articular surfaces of a fully encapsulated synovial joint, which in turn creates a reduction in pressure within the joint cavity. Synovial fluid cavitation has some evidence to support it. There were several hypotheses to explain the cracking of joints.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |