We identified 132 popping sounds following 37 upper cervical thrust manipulations resulting in a mean of 3.57 distinct pops and a range of 1 to 7 pops per C1–2 HVLA thrust manipulation.

To date and to our knowledge, no study has investigated the side, duration or number of audible popping sounds during upper cervical HVLA thrust manipulation. Therefore, the primary purpose of the ...

Cavitation was significantly more likely to occur bilaterally than unilaterally during upper cervical HVLA thrust manipulation; that is, the popping sounds associated with C1–2 manipulation were 11 ...