Anatomical and Radiographical Studies of the Skull in Adult European Badger (Meles meles)

The European badger (Meles meles) is a powerful animal native to Europe and parts of West Asia. The skull imparts the phylogenetic morphology to the skulls of animal species and functions as a safeguard for vital organs, including the brain and eyes. The aim of our study was to improve the current data by providing a comprehensive investigation of the morphology and dimensions of the cranium and mandible of badgers. This information enhances comprehension of radiological and surgical attributes. We conducted anatomical studies and measured the morphometric features. We received the skulls from naturally occurring carcasses. We employed unpaired t-test for statistical analysis. This study demonstrated that the anatomical features of the skull exhibit no discernible differences between badgers and other wild carnivores, such as tiger and wolf. The presence of a twin jugular foramen in the skull of badgers distinguishes them as a distinct characteristic not found in any other carnivorous animals. Moreover, radiographical studies showed two distinct sinuses and a cavity in the skull of badger which is different from dogs. Males and females differ significantly in some morphometric traits, which is entirely consistent with the behavioral and nutritional traits of the animal. Modern imaging techniques, such as CT scans, are necessary for more thorough studies on the skulls of wild carnivores

Normal Computed Tomography and Radiographic Study of the Nasal Cavity and Paranasal Sinuses in Shal Sheep (Ovis arries)

Understanding anatomical structures from the past to the present has been one of the guidelines for advancing medical and veterinary science worldwide. The lack of comprehensive information on the anatomy of the paranasal sinuses and the Shal sheep nasal cavity (Ovis aries) encouraged us to write this article. Computed tomography (CT) scan is a method that shows different parts of the body without superimposition of adjacent structures. Radiographic imaging also gives very high-resolution images of bones to examine bone structures. Paranasal sinuses of Shal sheep were composed of frontal, maxillary, lacrimal, and palatine sinuses, and the nasal sinuses were composed of dorsal, and middle nasal sinuses, which were identified and labeled in keeping with cheek teeth as landmarks. The width of the frontal bone and length of the nasal cavity at the level of the 6th cheek tooth were 7 ± 0.3 and 13 ± 0.8 cm, respectively. The volumes of both the right and left sinuses were measured automatically, and the accurate location of sinuses, canals, nasal folds, conchae, and meatuses, and connections between different parts of the nasal cavity and paranasal sinuses were described. The volume of the frontal, maxillary, and palatine sinuses were 279.3 ± 16.4, 80.6 ± 2.6, and 13.5 ± 0.2 cm3, respectively. Frontal, maxillary, and lacrimal sinuses were observed like other ruminants. But the palatine sinus in this breed was not present in the Egyptian sheep, Saanen, and Markhz goats. Also, unlike Sanan and Markhz goats and like Egyptian sheep, ventral nasal sinus was not observed in this breed

Micro-CT Anatomy of the Vertebral Column of the Luristan Newt (Neurergus kaiseri)

The Neurergus kaiseri is one of the native and endangered species of the Salamandridae family, which is restricted to the mountainous habitats of southern Lorestan and northern Khuzestan. The presence of this species in the environment and the risks surrounding the extinction and health of this species make it necessary to produce basic anatomical information. The present study investigated the typical morphological characteristics of normal, mature, and healthy Luristan newt (Neurergus kaiseri) vertebral column using a micro-CT scan. The samples were entered into the micro-CT scan machine one by one in a ventral recumbency. The typical morphological characteristics of normal, mature, and healthy Luristan newt (Neurergus kaiseri) vertebral column were examined. It was specified that the Luristan newt (Neurergus kaiseri) has one cervical vertebra (atlas), 12 trunk vertebrae, one sacral vertebra, 3 caudosacral vertebrae, and 28 to 31 caudal vertebrae. This study presents a complete and precise description evaluation of Luristan newt (Neurergus kaiseri) vertebral column using a micro-CT scan. No specimen was killed, and anatomical studies were conducted through a micro-CT scan technique as an essential feature of the present study

Normal CT Anatomy, Morphometry, and Volumetry of the Skull in Urial Sheep (Ovis vignei)

The urial (OOR-ee-əl; Ovis vignei), also known as the arkars or shapo, is a wild sheep native to Central and South Asia. It is listed as vulnerable on the International Union for Conservation of Nature (IUCN) Red List. Considering the importance of this breed in the world and its extinction, there is a need to determine the anatomy of the head area or any other disease such as fractures, dental, and infectious diseases. Five adult healthy male urial sheep were used, which were mature in terms of age. After preparation, the fresh alive sheep were immediately examined using a helical computed tomography scanner. The morphometry of the skull of this sheep was studied using RadiAnt application. The volume calculation was performed automatically using the software available on the CT scan system (Syngo MMWP VE40A software). The sinuses observed in the skull of this breed included frontal, maxillary, lacrimal, palatine, and sphenoidal sinuses. The height, length, and width of the skull were measured as 15.32 ± 0.05, 23.89 ± 0.08, and 12.57 ± 0.05 cm, respectively. According to the results obtained from the volume of different parts of the head in urial sheep, the nasal cavity and the oral cavity constitute 7% and 6% of the head volume, respectively. This ratio was calculated as 0.5% in the case of the inner and middle ears. Determining the anatomical structures and morphometric and volumetric characteristics of Urial sheep, which is one of the endangered Asian breeds, was of particular importance in order to prepare the head and skull atlas

CT anatomy and normal radiography of the skull of the Rhesus monkey (Macaca mulatta)

Abstract Background Considering the relationship between human morphology and physiology with the Rhesus monkey, this animal is the most prominent species of laboratory primate for human and animal health research. Moreover, sending Macaca mulatta monkey into space and simulating a living environment for humans shows the similarity of this animal's physiology with humans. Objective So far, no comprehensive study has been done on computed tomography (CT) scan and radiography of skulls in Rhesus monkeys. Therefore, providing accurate documents from the CT anatomy of the skull in these animals can help us to better understand normal conditions and diseases, and we can use a functional atlas of diagnostic imaging from the skull of this animal. Methods Ten mature monkeys weighing 6.5 kg were used for this project (five males and five females). A radiographic examination with standard views was performed during general anaesthesia. Then the monkeys were placed in a spherical CT scan during general anaesthesia with standard sternal recumbency. Results The frontal bone was seen as two parallel radiopaque lines coming forward and downward. The frontal sinus in the Rhesus monkey was not visible in both lateral and dorsoventral radiographs, which could indicate the degeneration of this sinus in this species. The number of teeth in an adult monkey was 32. Molar teeth had a bilophodont arrangement. Conclusions The comparison between the size of the eye ball in human and Rhesus monkey, unlike other measured parameters, did not differ much, and this indicates that the volume ratio of the eye ball to the whole skull in Rhesus monkey is higher than that of humans