Dorsal landmarks: LM1, External occipital protuberance; LM2, Junction of sutura coronalis and sutura interfrontalis; LM3, Junction of sutura interfrontalis; sutura internasalis and frontonasal suture; LM4, Anterior edge of sutura internasalis; LM5, Anterior edge of fi ssura interincisiva; LM6, Fissura nasomaxillaris; LM7, Tuber faciale; LM8, Medial angle of orbita; LM9, Foramen supraorbitale, LM10; Posterio-ventral corner of margo supraorbitalis.