Popsahdukset
Popsahdukset, often referred to as "cracking knuckles" in English, is a common sound produced when a person bends or stretches their fingers, particularly the joints. This sound is believed to be caused by the formation and collapse of gas bubbles within the synovial fluid that lubricates the joints. The synovial fluid contains dissolved gases like nitrogen and carbon dioxide. When the joint capsule is stretched, the pressure within the fluid decreases, causing these dissolved gases to form small bubbles. The rapid collapse or bursting of these bubbles creates the characteristic popping sound.
While the sound of popsahdukset is generally harmless, there has been ongoing debate and research regarding