There were several questions during lab today about what the “Scotty Dog” is on page 7 of Dr. Lockwood’s lab today.
The Scotty Dog Sign is a radiological finding.
In an oblique view of a normal lumbar spine, the outline of a Scotty Dog can be seen. The transverse process is the nose. The pedicle is the eye. The pars interarticularis is the neck. The superior articular facet is the ear. The inferior articular facet is the front leg.
A break in the neck of the dog, or a black dog collar, corresponds to a fracture in the region of the pars interarticularis, which is specific for spondylolysis. It is important to recognize as it is a cause of low back pain.
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