Anatomy and Embryology Department, Faculty of Veterinary Medicine, Alexandria University, Egypt.
Anatomy and Embryology Department, Faculty of Veterinary Medicine, Alexandria University, Egypt.
Morphologie. 2021 Feb;105(348):29-44. doi: 10.1016/j.morpho.2020.06.008. Epub 2020 Jul 6.
The objective of present investigation was to explore the morphology of the head in Ossimi sheep. Here, the nasal, paranasal sinuses, oral, orbital, cranial, auricular and pharyngeal cavities were examined by the computed tomography images interpreted by the anatomical sections. Also, three-dimensional CT of the head was reconstructed. The Ossimi sheep was shown to possess long, double scroll dorsal and ventral nasal conchae that occupy the nasal cavity rostrally, while its caudal part possessed five small ethmoidal triangular nasal projections, the largest one was the middle nasal concha and the others contained the ethmoidal sinus. The dorsal and middle nasal meatuses were narrow and the ventral meatus was wide and lead directly to the choanae. The nasal septum failed to reach the floor at the caudal part of the nasal cavity thus forming a single channel that continued to the nasopharynx. The vomeronasal organ extended throughout the length of the nasal cavity from the incisive duct caudal to the dental pad to the level of the 3 upper cheek tooth. The paranasal sinuses identified were the frontal, maxillary, lacrimal, palatine and ethmoidal sinuses. The study recorded the absence of the sphenoid sinus and small palatine sinus in sheep different from that in other ruminants. The obtained results may be useful as a basic anatomical reference for the surgeons and pathologists.
本研究旨在探讨奥希米绵羊头部的形态结构。通过对解剖学切片的计算机断层扫描图像进行解读，对鼻腔、副鼻窦、口腔、眼眶、颅腔、耳腔和咽腔进行了检查。此外，还对头骨进行了三维 CT 重建。结果表明，奥希米绵羊的鼻腔内有长而双螺旋的背侧和腹侧鼻甲，占据鼻腔的前部，而其后部有五个小的鼻甲三角鼻突，其中最大的是中鼻甲，其他的包含筛窦。背侧和中间鼻道狭窄，腹侧鼻道宽阔，直接通向鼻后孔。鼻中隔在鼻腔后部未到达底部，形成一个单一的通道，一直延伸到鼻咽部。犁鼻器从切齿管延伸到齿垫，再到 3 个上颊齿的位置，贯穿整个鼻腔。鉴定出的副鼻窦有额窦、上颌窦、泪窦、腭窦和筛窦。本研究记录了绵羊的蝶窦和小腭窦缺失，这与其他反刍动物不同。所得结果可为外科医生和病理学家提供基本的解剖学参考。
