What is highlighted on the side other than the head and what is represented by a single line

1. The basal plane of the skull: formed by the line connecting the infraorbital edge and the upper edge of the external auditory canal or external ear foramen. Also called the anthropological plane or Frankfort horizontal plane (eye-ear plane). Close to the Reid baseline plane.

2. Occlusal plane: This horizontal plane is the plane formed by the sharp surfaces between the upper and lower teeth when the jaw is closed (used as the reference plane of the head during dental and cranial photography)

3. Midsagittal plane or midline plane (MSP): The human body is divided into left and right halves, which is very important for precise positioning of the head. For each anteroposterior, posteroanterior or lateral projection, the plane is vertical or parallel. on the receiver plane.

4. Frontal surface of earlobe: Draw a vertical line along the anatomical horizontal plane along the external ear foramen, and divide the head into a coronal section of the front and back parts.