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The 'pars interarticularis', sometimes referred to as '''pars''' for short, is the part of vertebra located between the inferior and superior articular processes of the facet joint.^[1] In the transverse plane, it lies between the lamina and pedicle. It is abnormal in spondylolysis, either due to fracture or congenitally.^[2]
On an anterior oblique radiograph of the lumbar spine, the pars is the neck of the imaginary Scottie dog;
the Scottie dog's eye is the pedicle,^[3] its hindlegs the spinous process, its nose the transverse process and its forelegs the inferior articular facet.^[4]

Contents

See also

References

External links

See also

★ Terms for anatomical location

★ Spondylolysis
The pars interarticularis, sometimes referred to as pars for short, is the part of vertebra located between the inferior and superior articular processes of the facet joint.[1] In the transverse plane, it lies between the lamina and pedicle. It is abnormal in spondylolysis, either due to fracture or congenitally.[2]
On an anterior oblique radiograph of the lumbar spine, the pars is the neck of the imaginary Scottie dog; the Scottie dog's eye is the pedicle,[3] its hindlegs the spinous process, its nose the transverse process and its forelegs the inferior articular facet.[4]

References

1. Pars interarticularis. Stedman's Medical Dictionary. Available at: http://www.emedicine.com/asp/dictionary.asp?keyword=Pars+interarticularis. Accessed on: April 9, 2007.
2. Spondylolysis. Stedman's Medical Dictionary. URL: http://www.emedicine.com/asp/dictionary.asp?keyword=spondylolysis. Accessed on: April 14, 2007.
3. Congenital absence of a lumbar pedicle. A case report and a review of the literature, Macleod S, Hendry G, , , Pediatr Radiol, 1982
4. Capobianco JD. OMM Board Review. Available at: [1]. Accessed on: April 9, 2007.

External links

★ The Scottie dog and spondylolysis - meded.uscd.edu.