Which bone is best demonstrated in the anteroposterior (AP) axial projection (Towne method) of the skull?

The AP axial projection, specifically the Towne method, is designed to provide a clear view of the occipital bone. This radiographic technique involves positioning the patient's neck and head to project the cranial structures accurately. By angling the X-ray beam caudally (toward the feet), it allows for a precise visualization of the occipital condyles, and the foramen magnum, which are critical features of the occipital bone.

The occipital bone's anatomy is well-highlighted in this projection, giving a comprehensive view of its contour and any potential pathological conditions that affect this area. Thus, this method is particularly valuable when the goal is to assess the occipital bone and its relations to the spinal column.

While the other bones may have partial visibility in the Towne method, they do not receive the same level of detail and focus that the occipital bone does in this imaging technique, making it the most appropriate answer for this question.