Pars interarticularis

Pars interarticularis is a specific segment of the vertebral anatomy of the spine. It is the part of the vertebra located between the superior and inferior articular processes of the vertebrae in the spinal column. The term "pars interarticularis" is Latin for 'part between the articulations', and it is a small, thin part of the vertebra that connects the upper and lower segments of the facet joints in the spine.

Anatomy

The pars interarticularis is a small piece of bone that joins the upper and lower joints of the vertebrae. It is located in the posterior part of the vertebra, between the inferior articular process and the superior articular process. This part of the vertebra is critical for maintaining the alignment and strength of the spine.

File:Pars interarticularis.png

Illustration of the pars interarticularis in a vertebra.

Clinical significance

A defect or stress fracture in the pars interarticularis can lead to a condition known as spondylolysis, which is a common cause of lower back pain, especially in athletes. If both sides of the pars interarticularis are broken, it can lead to spondylolisthesis, a condition where one vertebra slips forward over the one below it.

Diagnosis

Diagnosis of conditions related to the pars interarticularis is typically done through imaging studies. These can include X-ray, CT scan, or MRI. The defect or fracture can often be seen as a break in the "neck" of the "Scottie dog" appearance of the vertebrae in oblique radiographic views.

Treatment

Treatment for conditions related to the pars interarticularis can range from conservative management with physical therapy and pain management, to surgical intervention in more severe cases. The specific treatment plan will depend on the severity of the condition, the patient's overall health, and their personal needs and goals.

See also

• Vertebra
• Spondylolysis
• Spondylolisthesis

References

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