Final answer:
For the oblique inferosuperior (tangential) projection of the zygomatic arches, a 45-degree head rotation toward the examined side and a 15-degree tilt away from the side are typically required.
Step-by-step explanation:
In the imaging of the zygomatic arches using the oblique inferosuperior (tangential) projection, skull positioning is crucial to allow for a clear view. While different protocols might suggest slight variations, a common approach requires the patient's head to be rotated 45 degrees toward the side being examined. Furthermore, the head should be tilted 15 degrees away from the side being imaged to properly display the zygomatic arch without superimposition from other cranial structures. The zygomatic arch is an elongated, free-standing arch on the lateral skull, playing an essential role in facial structure and function, notably involving muscles responsible for biting and chewing.