Scientists have unraveled yet another mystery of the human body that has tormented inquisitive minds around the world until now. Canadian doctors have found the answer to why our joints crunch.
Researcher and bioengineer Gregory Kawchuk from the University of Alberta in Calgary, Canada, together with a group of scientists and doctors headed by him, confirmed the hypothesis that cavitation is the cause of joint crunch - the appearance of tiny bubbles in the synovial fluid of the joint capsule. They create a characteristic sound when a person decides to "crunch" his joints.
This was confirmed thanks to a modern magnetic resonance tomograph and special tubes in which fingers were placed and extended during the experiment. The "test subject" was Jerome Fryer, a chiropractor from Nanaim.
Scientists do not exclude that the formation of a crunch may be due to other factors and they intend to continue research with the participation of other volunteers, including those unable to "crunch" their joints.
You can watch the process of “crunching” your finger when stretching in the video: