CAMRT Radiography Practice Exam

In an oblique lumbar spine view, what does the "neck" of the Scotty Dog represent?

1. Spinous process

2. Transverse process

3. Pars Interarticularis

4. Pedicle

The correct answer is: Pars Interarticularis

The "neck" of the Scotty Dog in an oblique lumbar spine view is a representation of the pars interarticularis. The Scotty Dog is a mnemonic used by radiologists to help visualize the anatomy of the lumbar vertebrae in oblique radiographs. The pars interarticularis is a part of the vertebra located between the superior and inferior articular processes. It plays a crucial role in maintaining the stability of the spine and is a common site for stress fractures, particularly in athletes. When viewing the lumbar spine obliquely, the shape of the Scotty Dog is formed by various components of the vertebrae, with the neck being specifically indicative of the pars interarticularis. In this context, understanding the role of the pars interarticularis and its anatomical position helps in both diagnosis and treatment planning, especially in cases of spondylolysis or other lumbar spine pathologies. The other components of the Scotty Dog, such as the head, eye, and body, correspond to different parts of the vertebrae, but the neck distinctly represents the pars interarticularis, emphasizing its significance in skeletal anatomy.