Where are the mammillary processes located in equine?

Where are the mammillary processes located in equine?

• A. T15-L5
• B. T17-L7
• C. T16-L6
• D. T18-L8

Answer: (C)

Mammillary processes mark the thoracolumbar junction and are located on the superior articular processes of the lumbar vertebrae in the horse. In the equine spine, the lumbar region starts after the last thoracic vertebra, so the boundary is around the last thoracic to the first lumbar vertebra. Practically, this region is described as about T16 through L6, which is why that range best fits the location. The other options place the boundary too far cranially or caudally for the true thoracolumbar junction in the horse.

Mammillary processes mark the thoracolumbar junction and are located on the superior articular processes of the lumbar vertebrae in the horse. In the equine spine, the lumbar region starts after the last thoracic vertebra, so the boundary is around the last thoracic to the first lumbar vertebra. Practically, this region is described as about T16 through L6, which is why that range best fits the location. The other options place the boundary too far cranially or caudally for the true thoracolumbar junction in the horse.