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> >>doctors: I crack my knuckles and sometimes my neck. I have heard that the
> >>popping noise may be due to the creation of a low pressure area in the 
> >>joint,
> >>which cavitates a bubble out of solution in the fluid of the joint. 

I doubt that it is actually a bubble coming out of solution, for the 
following reasons:

* as a previous poster mentioned, how is it possible for a presumably 
  large bubble to come out of solution so fast?
* the noise: how big a bubble is needed to create such a "pop"?
* isn't it just joints suddenly slipping?

- Gerrit

 ******************************************************************
 G. Conradie                             Phone: +27 21 808 4452 (W)
 Dept. E & E Engineering                        +27 21 903 4306 (H)    
 University of Stellenbosch              Fax:   +27 21 808 4981 (W) 
 Stellenbosch, 7600
 South Africa                       Email: conradie@fi*.su*.ac*.za*
 ******************************************************************

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