Arc

In craniometry, a measurement taken on the outside of the skull, following its curves. A., Bin auricular, a measurement from the center of one auditory meatus to the other, directly upward acro the top of the head. A., Bregma to lambdoid, a measurement along the sagittal suture. A., Naso-bregmatic, from the root of the nose to the bregma. A., Naso-occipital, measurement from the root of the nose to the lowest occipital protuberance.