When you have someone crack your back or neck, (or you do it yourself). What makes the cracking sound?

5 Responses to When you have someone crack your back or neck, (or you do it yourself). What makes the cracking sound?

1. debo189 | October 22, 2009 at 9:37 pm |

   i think it has to do with air in between the joints

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2. RealPlayaz | October 22, 2009 at 10:36 pm |

   ur bones sliding into different positions, when ur muscles push onto them!

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3. UNITool | October 22, 2009 at 11:36 pm |

   2 possibilites – it could actually be vertebrae moving very slightly, or could be bubbles of gas that build up in the joints between vertebrae as we move. This second one is the same as the sound when you crack your knuckles.

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4. jerry_melendez | October 23, 2009 at 12:34 am |

   your bones make the cracking sound

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5. dankcmo | October 23, 2009 at 1:37 am |

   same as when you crack your knuckles, there is a fluid that fills your joints and when your joints expand / contract the fluid is pushed into / forced out of the space created by the movement.

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