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. 2011 Mar 31;44(1):79–83. doi: 10.5115/acb.2011.44.1.79

Fig. 1.

Fig. 1

Arrow 1 represents the distance between infraorbital foramen and the piriform aperture along the sagittal plane. Arrow 2 represents the distance between infraorbital foramen and infraorbital margin along transverse plane perpendicular to the sagittal plane. IOF, infraorbital foramen; IOM, infraorbital margin; PA, piriform aperture; SP, sagittal plane; TP, transverse plane.