What Is Pars Interarticularis?

The Pars Interarticularis is a special region of the lamina between the superior and inferior articular processes.

pars interarticularisThe pars interarticularis,  pars for short, is the part of vertebra located between the inferior and superior articular processes of the facet joint.

This is weakest part of the lamina and a fracture or congenital anomaly of the pars may result in a Spondylolisthesis.

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  1. [...] of the neural arch of the axis predominately affects the narrow zone of the pars interarticularis and may be associated with more complex soft tissue [...]