Abstract
Hypophyseal triangles are the matter of great interest in human anatomy as well as in comprative anatomy. Stated in the following are the findings of the craniometric studies done on the dog.
As the mean of ∠LPLO in ΔPLO of the dog was the largest at 68.2°±0.44, while the mean of ∠LPO was the smallest at 46.7°±0.49, they were different from the respective measurements of human being. And, as the mean of ∠PBO in ΔPOB was the largest at 99.6°±0.65, while the mean of ∠BPO was the smallest at 19.9°±0.22, the latter resembled to the mean human measurement of 19.4°± 0.12.
On the other hand, the mean of ∠BPL in ΔPLB was the largest at 66.7°±0.57, while the mean of ∠PLB was the smallest at 2.3°±0.37 showing no resemblance to the respective measurements of human being.
Namely, in the dog, the ΔPLB having ∠PLB as its vertical angle approaches to an equilateral triangle, while in the case of human being, it forms a high isosceles triangle having ∠PLB as its vertical angle.
