A pars interarticularis defect is a unilateral or bilateral fracture involving the pars interarticularis of the posterior vertebral arch. This injury occurs almost exclusively in the lower lumbar region, most often at L5.
Where is T2 T3 T4 on spine?
T1: First thoracic vertebra. T2: Second thoracic vertebra. T3: Third thoracic vertebra. T4: Fourth thoracic vertebra.
What are the 5 regions of the vertebral column how many bones are in each region?
Answer: The adult vertebral column consists of 24 vertebrae, plus the sacrum and coccyx. The vertebrae are subdivided into cervical, thoracic, and lumbar regions. There are seven cervical vertebrae (C1–C7), 12 thoracic vertebrae (T1–T12), and five lumbar vertebrae (L1–L5).
Which type of joint is between the vertebrae?
The joints of the vertebral bodies are secondary cartilaginous joints (symphyses, singular: symphysis) designed for weight bearing and strength. The articulating surfaces of adjacent vertebrae are connected by intervertebral (IV) discs and ligaments.
Where is pars interarticularis located?
Pars interarticularis refers to a small segment of bone that joins the facet joints in the back of the spine.
What is the function of the pars interarticularis?
Pars Interarticularis, Structural Forces and Stress The joints above are connected to the joints below in one vertebra through the pars interarticularis. The pars interarticularis means the “part between the articulations” in Latin and is the bony bridge that joins these two upper and lower facets.
What are the 5 sections of the vertebral column?
The spine is composed of 33 bones, called vertebrae, divided into five sections: the cervical, thoracic, and lumbar spine sections, and the sacrum and coccyx bones. The cervical section of the spine is made up of the top seven vertebrae in the spine, C1 to C7, and is connected to the base of the skull.
What are facet joints between?
The facet joints are the connections between the bones of the spine. The nerve roots pass through these joints to go from the spinal cord to the arms, legs and other parts of the body. These joints also allow the spine to bend and twist, and they keep the back from slipping too far forward or twisting without limits.
How many joints does each vertebrae have?
four facet
Each vertebra has four facet joints, one pair that connects to the vertebra above (superior facets) and one pair that connects to the vertebra below (inferior facets) (Fig. 6). Figure 6. The superior and inferior facets connect each vertebra together.
