What is making the actual sound that we hear when we crack our knuckles? Is it cartilage or what?

Answer 1

The cracking or popping sound is thought to be caused by the gases rapidly coming out of solution, allowing the capsule to stretch a little further. The stretching of the joint is soon thereafter limited by the length of the capsule. If you take an x-ray of the joint after cracking, you can see a gas bubble inside the joint. This gas increases the joint volume by 15 to 20 percent; it consists mostly (about 80 percent) of carbon dioxide. The joint cannot be cracked again until the gases have dissolved back into the synovial fluid, which explains why you cannot crack the same knuckle repeatedly.

Answer 2

Cracking joints is the practice of manipulating one's joints such that it produces a sharp sound, likened to cracking (also likened to popping, etc.). To produce the sounds, many people will bend their fingers or other joints into unusual positions, or manipulate them in ways which are not commonly experienced in everyday use. For example, bending the fingers right back towards the back of the hand, pulling them away from the hand, or compressing a finger knuckle palmarly.

In many early motion pictures and subsequently parodied in animated cartoons, the gesture of cracking knuckles was associated with a "tough guy" image, especially when accompanied by the implicit or explicit threat of violence.

Answer 3

Air pockets within the cartilage material being released.

Answer 4

its the joints cracking I think

Answer 5

It is actually air pockets in our joints.

Answer 6

the joints in your fingers rubbing together and dislocating and relocating

Answer 7

it is nitrogen being released from between the joint