Advances in Animal Anatomy

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Animal Physiology".

Deadline for manuscript submissions: closed (31 March 2021) | Viewed by 96735

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Guest Editor
Unit of Veterinary Anatomy and Embryology, Department of Anatomy, Animal Production and Clinical Veterinary Sciences, Faculty of Veterinary Sciences, University of Santiago de Compostela–Campus of Lugo, 27002 Lugo, Spain
Interests: veterinary sciences; anatomy
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Unit of Veterinary Anatomy and Embryology, Department of Anatomy, Animal Production and Clinical Veterinary Sciences, Faculty of Veterinary Sciences, University of Santiago de Compostela–Campus of Lugo, 27002 Lugo, Spain
Interests: animal anatomy; embryology; welfare, behaviour and anatomy of laboratory animals; applied anatomy of exotic animals; veterinary embryology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Knowledge of veterinary anatomy (as a basic science) is a prerequisite to master clinical (and some preclinical) disciplines and, subsequently, veterinary practice. Fortunately, descriptive anatomy is no longer the only method of teaching veterinary anatomy, and instead, applied veterinary anatomy is providing additional value in practical and clinical study.

As the subject of veterinary anatomy is being progressively reduced in academic programs, only basic functional, comparative, and applied aspects are taught in depth, even though knowledge of certain other anatomy-related concepts may be of great interest in application. Hence, we aim to publish original research, as well as reviews, that improve our understanding of applied veterinary anatomy, particularly papers that address the following topics:

1- Applied anatomy of domestic animals (mammals and birds), which facilitates the use of different approaches and the recognition of structures in diagnostic imaging or which helps in the comprehension of animal physiology.

2- Anatomy of wild animals, which could be very helpful to specialized veterinarians, researchers, and technicians to maintain the welfare of animals in zoos and wildlife recovery centers.

3- Anatomy of new companion animals, focused on the less well-known species that are being introduced into homes and require veterinary assistance, mainly because they are not adapted to life in captivity. Knowledge of their anatomy is essential, specifically in the following areas:

3.1- Diagnostic imaging to facilitate the recognition of the bones, viscera, and vessels in order to make a correct diagnosis.

3.2- Access to their superficial venous system that would allow for the taking blood samples or treatment administration (drugs/rehydration by dropper, etc.).

3.3- Clinical interventions (intubation, surgery, etc.) performed to avoid damaging vital structures.

3.4- Their anatomical adaptations to the environment during evolution and the pathologies derived from displacement from their habitats and life in captivity.

Additionally, apart from anatomical knowledge, the preservation of dissected specimens or their viscera is essential for the following:

1- Teaching in faculties/schools of veterinary medicine, as well as exhibiting specimens in anatomical museums, to avoid long and meticulous dissections and to reuse dissected specimens as much as possible.

2- The study of the anatomy of the new companion animals, of which there are few specimens available for studying.

The most used conservation method during the 20th century was formaldehyde (used in different concentrations or as part of fixative solutions), which must be abandoned due to its carcinogenic potential and powerful irritant effect on the eyes and airways. In addition, formaldehyde modifies considerably the color and consistency of tissues, creating confusion about the normal macroscopic appearance. Furthermore, it causes muscles to become rigid, reducing the physiological movement of joints, which is essential for teaching future veterinarians and technicians.

In recent years, new preservatives have been tested to minimize such drawbacks, such as the use of saturated saline solution; therefore, we also invite our colleagues to submit contributions describing their advances in preservation methods that will surely improve the practical study of anatomy.

Prof. Dr. Matilde Lombardero Fernández
Prof. Dr. María del Mar Yllera Fernández
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • applied veterinary anatomy
  • domestic species
  • exotic pets
  • wild animals
  • gross anatomy
  • anatomical preservation
  • dissection

Published Papers (15 papers)

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Editorial

Jump to: Research, Review

7 pages, 1848 KiB  
Editorial
Advances in Animal Anatomy
by Matilde Lombardero and María del Mar Yllera
Animals 2023, 13(6), 1110; https://doi.org/10.3390/ani13061110 - 21 Mar 2023
Viewed by 1468
Abstract
This Special Issue was the result of reviewing Leonardo da Vinci's anatomical drawings of the bear foot and the horse trunk (among others) [...] Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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Research

Jump to: Editorial, Review

9 pages, 552 KiB  
Article
Radiogrametric Analysis of the Thoracic Limb Phalanges in Arabian Horses and Thoroughbred Horses
by Ozan Gündemir, Tomasz Szara, Gülsün Pazvant, Dilek Olğun Erdikmen, Sokol Duro and William Perez
Animals 2021, 11(8), 2205; https://doi.org/10.3390/ani11082205 - 26 Jul 2021
Cited by 7 | Viewed by 4013
Abstract
In this study, it was aimed to determine the statistical differences between Arabian horses and Thoroughbred horses based on X-ray images of forelimb digital bones. Latero-medial X-ray images of digital bones of thoracic limbs were taken of 25 Arabian horses and 50 Thoroughbred [...] Read more.
In this study, it was aimed to determine the statistical differences between Arabian horses and Thoroughbred horses based on X-ray images of forelimb digital bones. Latero-medial X-ray images of digital bones of thoracic limbs were taken of 25 Arabian horses and 50 Thoroughbred healthy horses. The difference between males and females within the breed was statistically analyzed as well. Nine measurements and three indexes taken from phalanges of thoracic limbs were used. Thoroughbred horses did not differ significantly between sexes, as indicated by the ANOVA. For the Arabian horses, the length of the middle of the proximal phalanx (p < 0.05), the length of the middle of the middle phalanx (p < 0.001), and the length of the dorsal surface of the distal phalanx (p < 0.05) measurement points were found to be differentiated between sexes. In the analysis made between Thoroughbred horses and Arabian horses with no respect to sex, the critical measurement was the depth of the caput of the proximal phalanx. The discriminant analysis enabled the correct classification of 89.33% of the proximal phalanx samples to the exact breed. The correct classification rate was 77.33% in the case of middle phalanx and 54.67% in the case of distal phalanx. Measurement results of the distal phalanx were found to be insignificant between both breeds and sexes. The radiological measurements of digital bones showed that sexual dimorphism was not too expressed and that decisive differences were found between the breeds. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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39 pages, 20695 KiB  
Article
Endoscopic Study of the Oral and Pharyngeal Cavities in the Common Dolphin, Striped Dolphin, Risso’s Dolphin, Harbour Porpoise and Pilot Whale: Reinforced with Other Diagnostic and Anatomic Techniques
by Álvaro García de los Ríos y Loshuertos, Marta Soler Laguía, Alberto Arencibia Espinosa, Francisco Martínez Gomariz, Cayetano Sánchez Collado, Alfredo López Fernández, Francisco Gil Cano, Juan Seva Alcaraz and Gregorio Ramírez Zarzosa
Animals 2021, 11(6), 1507; https://doi.org/10.3390/ani11061507 - 22 May 2021
Cited by 1 | Viewed by 5110
Abstract
In this work, the fetal and newborn anatomical structures of the dolphin oropharyngeal cavities were studied. The main technique used was endoscopy, as these cavities are narrow tubular spaces and the oral cavity is difficult to photograph without moving the specimen. The endoscope [...] Read more.
In this work, the fetal and newborn anatomical structures of the dolphin oropharyngeal cavities were studied. The main technique used was endoscopy, as these cavities are narrow tubular spaces and the oral cavity is difficult to photograph without moving the specimen. The endoscope was used to study the mucosal features of the oral and pharyngeal cavities. Two pharyngeal diverticula of the auditory tubes were discovered on either side of the choanae and larynx. These spaces begin close to the musculotubaric channel of the middle ear, are linked to the pterygopalatine recesses (pterygoid sinus) and they extend to the maxillopalatine fossa. Magnetic Resonance Imaging (MRI), osteological analysis, sectional anatomy, dissections, and histology were also used to better understand the function of the pharyngeal diverticula of the auditory tubes. These data were then compared with the horse’s pharyngeal diverticula of the auditory tubes. The histology revealed that a vascular plexus inside these diverticula could help to expel the air from this space to the nasopharynx. In the oral cavity, teeth remain inside the alveolus and covered by gums. The marginal papillae of the tongue differ in extension depending on the fetal specimen studied. The histology reveals that the incisive papilla is vestigial and contain abundant innervation. No ducts were observed inside lateral sublingual folds in the oral cavity proper and caruncles were not seen in the prefrenular space. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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12 pages, 2693 KiB  
Article
Morphometrical Study of the Lumbar Segment of the Internal Vertebral Venous Plexus in Dogs: A Contrast CT-Based Study
by Valeria Ariete, Natalia Barnert, Marcelo Gómez, Marcelo Mieres, Bárbara Pérez and Juan Claudio Gutierrez
Animals 2021, 11(6), 1502; https://doi.org/10.3390/ani11061502 - 22 May 2021
Cited by 5 | Viewed by 5553
Abstract
The internal vertebral venous plexus (IVVP) is a thin-walled, valveless venous network that is located inside the vertebral canal, communicating with the cerebral venous sinuses. The objective of this study was to perform a morphometric analysis of the IVVP, dural sac, epidural space [...] Read more.
The internal vertebral venous plexus (IVVP) is a thin-walled, valveless venous network that is located inside the vertebral canal, communicating with the cerebral venous sinuses. The objective of this study was to perform a morphometric analysis of the IVVP, dural sac, epidural space and vertebral canal between the L1 and L7 vertebrae with contrast-enhanced computed tomography (CT). Six clinically healthy adult dogs weighing between 12 kg to 28 kg were used in the study. The CT venographic protocol consisted of a manual injection of 880 mgI/kg of contrast agent (587 mgI/kg in a bolus and 293 mgI/mL by continuous infusion). In all CT images, the dimensions of the IVVP, dural sac, and vertebral canal were collected. Dorsal reconstruction CT images showed a continuous rhomboidal morphological pattern for the IVVP. The dural sac was observed as a rounded isodense structure throughout the vertebral canal. The average area of the IVVP ranged from 0.61 to 0.74 mm2 between L1 and L7 vertebrae (6.3–8.9% of the vertebral canal), and the area of the dural sac was between 1.22 and 7.42 mm2 (13.8–72.2% of the vertebral canal). The area of the epidural space between L1 and L7 ranged from 2.85 to 7.78 mm2 (27.8–86.2% of the vertebral canal). This CT venography protocol is a safe method that allows adequate visualization and morphometric evaluation of the IVVP and adjacent structures. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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12 pages, 17075 KiB  
Article
Cranial Structure of Varanus komodoensis as Revealed by Computed-Tomographic Imaging
by Sara Pérez, Mario Encinoso, Juan Alberto Corbera, Manuel Morales, Alberto Arencibia, Eligia González-Rodríguez, Soraya Déniz, Carlos Melián, Alejandro Suárez-Bonnet and José Raduan Jaber
Animals 2021, 11(4), 1078; https://doi.org/10.3390/ani11041078 - 09 Apr 2021
Cited by 4 | Viewed by 2859
Abstract
This study aimed to describe the anatomic features of the normal head of the Komodo dragon (Varanus komodoensis) identified by computed tomography. CT images were obtained in two dragons using a helical CT scanner. All sections were displayed with a bone [...] Read more.
This study aimed to describe the anatomic features of the normal head of the Komodo dragon (Varanus komodoensis) identified by computed tomography. CT images were obtained in two dragons using a helical CT scanner. All sections were displayed with a bone and soft tissue windows setting. Head reconstructed, and maximum intensity projection images were obtained to enhance bony structures. After CT imaging, the images were compared with other studies and reptile anatomy textbooks to facilitate the interpretation of the CT images. Anatomic details of the head of the Komodo dragon were identified according to the CT density characteristics of the different organic tissues. This information is intended to be a useful initial anatomic reference in interpreting clinical CT imaging studies of the head and associated structures in live Komodo dragons. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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37 pages, 15466 KiB  
Article
Comparative Anatomy of the Nasal Cavity in the Common Dolphin Delphinus delphis L., Striped Dolphin Stenella coeruleoalba M. and Pilot Whale Globicephala melas T.: A Developmental Study
by Alvaro García de los Ríos y Loshuertos, Marta Soler Laguía, Alberto Arencibia Espinosa, Alfredo López Fernández, Pablo Covelo Figueiredo, Francisco Martínez Gomariz, Cayetano Sánchez Collado, Nuria García Carrillo and Gregorio Ramírez Zarzosa
Animals 2021, 11(2), 441; https://doi.org/10.3390/ani11020441 - 08 Feb 2021
Cited by 8 | Viewed by 4050
Abstract
Our goal was to analyze the main anatomical structures of the dolphin external nose and nasal cavity from fetal developmental stages to adult. Endoscopy was used to study the common development of the external nose and the melon, and nasal mucosa. Magnetic resonance [...] Read more.
Our goal was to analyze the main anatomical structures of the dolphin external nose and nasal cavity from fetal developmental stages to adult. Endoscopy was used to study the common development of the external nose and the melon, and nasal mucosa. Magnetic resonance imaging (MRI) and anatomical sections were correlated with anatomical sections. Computed tomography (CT) was used to generate 3D reconstructions of the nasal bones and nasal cavities to study its development. Dissections, histological and pathological studies were carried out on the nasal mucosa to understand its function. These results were compared with the horse. Endoscopy showed an external nose with two lips and the upper lip is divided by a groove due to the nasal septum and an obstruction of right nasal cavity was diagnosed in a newborn. Two diverticula (air sacs) were found in the nasal vestibule and an incisive recess (premaxillary sac) in the nasal cavity. These findings were corroborated by 3D reconstructions of the nasal cavities, MRI, anatomical sections and dissections. The presphenoid and ethmoid bones were fused at early stages of fetal development. The ethmoid is the last bone to ossify in the nasal cavity. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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14 pages, 5067 KiB  
Article
Sex Determination in Two Species of Anuran Amphibians by Magnetic Resonance Imaging and Ultrasound Techniques
by María José Ruiz-Fernández, Sara Jiménez, Encarnación Fernández-Valle, M. Isabel García-Real, David Castejón, Nerea Moreno, María Ardiaca, Andrés Montesinos, Salvador Ariza and Juncal González-Soriano
Animals 2020, 10(11), 2142; https://doi.org/10.3390/ani10112142 - 18 Nov 2020
Cited by 4 | Viewed by 8115
Abstract
The objective of the present study was to evaluate whether gender determination in two amphibian species (Kaloula pulchra and Xenopus laevis) can be reliably carried out by means of magnetic resonance imaging (benchtop magnetic resonance imaging; BT-MRI) or ultrasound (high-resolution ultrasound; [...] Read more.
The objective of the present study was to evaluate whether gender determination in two amphibian species (Kaloula pulchra and Xenopus laevis) can be reliably carried out by means of magnetic resonance imaging (benchtop magnetic resonance imaging; BT-MRI) or ultrasound (high-resolution ultrasound; HR-US) techniques. Two species of healthy, sexually mature anurans have been used in the present study. Eight Kaloula (blind study) and six Xenopus were used as controls. Magnetic resonance imaging experiments were carried out on a low-field (1 Tesla) benchtop-MRI (BT-MRI) system. HR-US examination was performed with high-resolution equipment. Low-field BT-MRI images provided a clear and quantifiable identification of all the sexual organs present in both genders and species. The HR-US also allowed the identification of testes and ovaries in both species. Results indicate that BT-MRI allowed a very precise sex identification in both anuran species, although its use is limited by the cost of the equipment and the need for anesthesia. HR-US allowed an accurate identification of ovaries of both species whereas a precise identification of testes is limited by the ultrasonographer experience. The main advantages of this technique are the possibility of performing it without anesthesia and the higher availability of equipment in veterinary and zoo institutions. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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16 pages, 3009 KiB  
Article
Maxillary Incisors of the Horse before and at the Beginning of the Teeth Shedding: Radiographic and CT Study
by Francisco Miró, Carla Manso, Andrés Diz and Manuel Novales
Animals 2020, 10(9), 1618; https://doi.org/10.3390/ani10091618 - 10 Sep 2020
Cited by 3 | Viewed by 3351
Abstract
To gain insight into the radiographic appearance of maxillary deciduous incisors and dental germs of maxillary permanent incisors in the period prior to teeth shedding, radiographs and computed tomography (CT) of 25 horse skulls, with an estimated age of between 12 and 42 [...] Read more.
To gain insight into the radiographic appearance of maxillary deciduous incisors and dental germs of maxillary permanent incisors in the period prior to teeth shedding, radiographs and computed tomography (CT) of 25 horse skulls, with an estimated age of between 12 and 42 months, were studied. Data regarding morphology and development were obtained. Dental germs of first maxillary permanent incisors were identified radiographically as rounded radiolucent areas at the level of the apical parts of the first deciduous incisors, in skulls with an estimated age of twelve months. The first sign of crown mineralization of these dental germs appeared in skulls supposedly a few months older. Before teeth shedding, the unerupted, mineralized crowns of the first permanent incisor could be identified radiographically relatively caudal to the corresponding first deciduous incisors. The results of the present study indicate that radiographic intraoral images are suitable to identify the grade of development of the dental germs of maxillary permanent incisors. A detailed description of the radiographic appearance of deciduous incisors and dental germs of permanent incisors will help clinicians to expand their knowledge for diagnostic or treatment purposes. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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17 pages, 4318 KiB  
Article
Anatomical Assessment of the Thorax in the Neonatal Foal Using Computed Tomography Angiography, Sectional Anatomy, and Gross Dissections
by Alberto Arencibia, Juan Alberto Corbera, Gregorio Ramírez, María Luisa Díaz-Bertrana, Lidia Pitti, Manuel Morales and José Raduan Jaber
Animals 2020, 10(6), 1045; https://doi.org/10.3390/ani10061045 - 17 Jun 2020
Cited by 7 | Viewed by 2647
Abstract
The purpose of this study was to correlate the anatomic features of the normal thorax of neonatal foals identified by CTA, with anatomical sections and gross dissections. Contrast-enhanced transverse CTA images were obtained in three neonatal foals using a helical CT scanner. All [...] Read more.
The purpose of this study was to correlate the anatomic features of the normal thorax of neonatal foals identified by CTA, with anatomical sections and gross dissections. Contrast-enhanced transverse CTA images were obtained in three neonatal foals using a helical CT scanner. All sections were imaged with a bone, mediastinal, and lung windows setting. Moreover, cardiac volume-rendered reconstructed images were obtained. After CT imaging, the cadaver foals were sectioned and dissected to facilitate the interpretation of the intrathoracic cardiovascular structures to the corresponding CTA images. Anatomic details of the thorax of neonatal foals were identified according to the characteristics of CT density of the different organic tissues and compared with the corresponding anatomical sections and gross dissections. The information obtained provided a valid anatomic pattern of the thorax of foals, and useful information for CTA studies of this region. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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21 pages, 4010 KiB  
Article
A Morphological and Morphometric Dental Analysis as a Forensic Tool to Identify the Iberian Wolf (Canis Lupus Signatus)
by Víctor Toledo González, Fernando Ortega Ojeda, Gabriel M. Fonseca, Carmen García-Ruiz, Pablo Navarro Cáceres, Pilar Pérez-Lloret and María del Pilar Marín García
Animals 2020, 10(6), 975; https://doi.org/10.3390/ani10060975 - 03 Jun 2020
Cited by 9 | Viewed by 8356
Abstract
Depredation by the Iberian wolf (Canis lupus signatus) is currently thought to be a problem in some areas of Spain. However, there are few technically validated forensic tools available to determine the veracity of claims with a high degree of scientific [...] Read more.
Depredation by the Iberian wolf (Canis lupus signatus) is currently thought to be a problem in some areas of Spain. However, there are few technically validated forensic tools available to determine the veracity of claims with a high degree of scientific confidence, which is important given that such attacks may lead to compensation. The analysis of bite marks on attacked animals could provide scientific evidence to help identify the offender. Thus, the aim of this study was to assess the morphological and morphometric characteristics of Iberian wolf dentition. This data collection would serve as a base-point for a more accurate identification of the wolves thorough their bite marks. For the first time, 36 dental variables have been studied in wolves’ skulls, employing univariate and multivariate analyses. The general morphological dental characteristics of wolves are very similar in terms of their dental formula and tooth structure to other canids, like domestic dogs. Sex differentiation was evident, principally in terms of the maxillary distance between the palatal surfaces of the canine teeth (UbC) and the width of the left mandibular canine teeth (LlCWd). New morphometric reference information was obtained that can aid the forensic identification of bite marks caused by the Iberian wolf with greater confidence. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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24 pages, 4446 KiB  
Article
A Study of the Head during Prenatal and Perinatal Development of Two Fetuses and One Newborn Striped Dolphin (Stenella coeruleoalba, Meyen 1833) Using Dissections, Sectional Anatomy, CT, and MRI: Anatomical and Functional Implications in Cetaceans and Terrestrial Mammals
by Álvaro García de los Ríos y Loshuertos, Alberto Arencibia Espinosa, Marta Soler Laguía, Francisco Gil Cano, Francisco Martínez Gomariz, Alfredo López Fernández and Gregorio Ramírez Zarzosa
Animals 2019, 9(12), 1139; https://doi.org/10.3390/ani9121139 - 13 Dec 2019
Cited by 4 | Viewed by 4939
Abstract
Our objective was to analyze the main anatomical structures of the dolphin head during its developmental stages. Most dolphin studies use only one fetal specimen due to the difficulty in obtaining these materials. Magnetic resonance imaging (MRI) and computed tomography (CT) of two [...] Read more.
Our objective was to analyze the main anatomical structures of the dolphin head during its developmental stages. Most dolphin studies use only one fetal specimen due to the difficulty in obtaining these materials. Magnetic resonance imaging (MRI) and computed tomography (CT) of two fetuses (younger and older) and a perinatal specimen cadaver of striped dolphins were scanned. Only the older fetus was frozen and then was transversely cross-sectioned. In addition, gross dissections of the head were made on a perinatal and an adult specimen. In the oral cavity, only the mandible and maxilla teeth have started to erupt, while the most rostral teeth have not yet erupted. No salivary glands and masseter muscle were observed. The melon was well identified in CT/MRI images at early stages of development. CT and MRI images allowed observation of the maxillary sinus. The orbit and eyeball were analyzed and the absence of infraorbital rim together with the temporal process of the zygomatic bone holding periorbit were described. An enlarged auditory tube was identified using anatomical sections, CT, and MRI. We also compare the dolphin head anatomy with some mammals, trying to underline the anatomical and physiological changes and explain them from an ontogenic point of view. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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13 pages, 3226 KiB  
Article
Anatomic Study of the Elbow Joint in a Bengal Tiger (Panthera tigris tigris) Using Magnetic Resonance Imaging and Gross Dissections
by Mario Encinoso, Jorge Orós, Gregorio Ramírez, José Raduan Jaber, Alejandro Artiles and Alberto Arencibia
Animals 2019, 9(12), 1058; https://doi.org/10.3390/ani9121058 - 01 Dec 2019
Cited by 4 | Viewed by 9579
Abstract
The objective of our research was to describe the normal appearance of the bony and soft tissue structures of the elbow joint in a cadaver of a male mature Bengal tiger (Panthera tigris tigris) scanned via MRI. Using a 0.2 Tesla [...] Read more.
The objective of our research was to describe the normal appearance of the bony and soft tissue structures of the elbow joint in a cadaver of a male mature Bengal tiger (Panthera tigris tigris) scanned via MRI. Using a 0.2 Tesla magnet, Spin-echo (SE) T1-weighting, and Gradient-echo short tau inversion recovery (GE-STIR), T2-weighting pulse sequences were selected to generate sagittal, transverse, and dorsal planes. In addition, gross dissections of the forelimb and its elbow joint were made. On anatomic dissections, all bony, articular, and muscular structures could be identified. The MRI images allowed us to observe the bony and many soft tissues of the tiger elbow joint. The SE T1-weighted MR images provided good anatomic detail of this joint, whereas the GE-STIR T2-weighted MR pulse sequence was best for synovial cavities. Detailed information is provided that may be used as initial anatomic reference for interpretation of MR images of the Bengal tiger (Panthera tigris tigris) elbow joint and in the diagnosis of disorders of this region. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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Review

Jump to: Editorial, Research

17 pages, 2170 KiB  
Review
The Cat Mandible (II): Manipulation of the Jaw, with a New Prosthesis Proposal, to Avoid Iatrogenic Complications
by Matilde Lombardero, Mario López-Lombardero, Diana Alonso-Peñarando and María del Mar Yllera
Animals 2021, 11(3), 683; https://doi.org/10.3390/ani11030683 - 04 Mar 2021
Cited by 3 | Viewed by 3770
Abstract
The cat mandible is relatively small, and its manipulation implies the use of fixing methods and different repair techniques according to its small size to keep its biomechanical functionality intact. Attempts to fix dislocations of the temporomandibular joint should be primarily performed by [...] Read more.
The cat mandible is relatively small, and its manipulation implies the use of fixing methods and different repair techniques according to its small size to keep its biomechanical functionality intact. Attempts to fix dislocations of the temporomandibular joint should be primarily performed by non-invasive techniques (repositioning the bones and immobilisation), although when this is not possible, a surgical method should be used. Regarding mandibular fractures, these are usually concurrent with other traumatic injuries that, if serious, should be treated first. A non-invasive approach should also first be considered to fix mandibular fractures. When this is impractical, internal rigid fixation methods, such as osteosynthesis plates, should be used. However, it should be taken into account that in the cat mandible, dental roots and the mandibular canal structures occupy most of the volume of the mandibular body, a fact that makes it challenging to apply a plate with fixed screw positions without invading dental roots or neurovascular structures. Therefore, we propose a new prosthesis design that will provide acceptable rigid biomechanical stabilisation, but avoid dental root and neurovascular damage, when fixing simple mandibular body fractures. Future trends will include the use of better diagnostic imaging techniques, a patient-specific prosthesis design and the use of more biocompatible materials to minimise the patient’s recovery period and suffering. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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15 pages, 42871 KiB  
Review
The Cat Mandible (I): Anatomical Basis to Avoid Iatrogenic Damage in Veterinary Clinical Practice
by Matilde Lombardero, Diana Alonso-Peñarando and María del Mar Yllera
Animals 2021, 11(2), 405; https://doi.org/10.3390/ani11020405 - 05 Feb 2021
Cited by 6 | Viewed by 16019
Abstract
Cats are one of our favourite pets in the home. They differ considerably from dogs but are usually treated clinically as small dogs, despite some anatomical and physiological dissimilarities. Their mandible is small and has some peculiarities relative to the dentition (only three [...] Read more.
Cats are one of our favourite pets in the home. They differ considerably from dogs but are usually treated clinically as small dogs, despite some anatomical and physiological dissimilarities. Their mandible is small and has some peculiarities relative to the dentition (only three incisors, a prominent canine, two premolars and one molar); a conical and horizontally oriented condyle, and a protudent angular process in its ventrocaudal part. Most of the body of the mandible is occupied by the mandibular dental roots and the mandibular canal that protects the neurovascular supply: the inferior alveolar artery and vein, and the inferior alveolar nerve that exits the mandible rostrally as the mental nerves. They irrigate and innervate all the teeth and associated structures such as the lips and gingiva. Tooth roots and the mandibular canal account for up to 70% of the volume of the mandibular body. Consequently, when fractured it is difficult to repair without invading the dental roots or vascular structures. Gaining a comprehensive anatomical knowledge and good clinical practice (such as image diagnosis before and post-surgery) will help in the awareness and avoidance of iatrogenic complications in day-to-day feline clinical practice. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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17 pages, 6809 KiB  
Review
Leonardo da Vinci’s Animal Anatomy: Bear and Horse Drawings Revisited
by Matilde Lombardero and María del Mar Yllera
Animals 2019, 9(7), 435; https://doi.org/10.3390/ani9070435 - 10 Jul 2019
Cited by 3 | Viewed by 8584
Abstract
Leonardo da Vinci was one of the most influencing personalities of his time, the perfect representation of the ideal Renaissance man, an expert painter, engineer and anatomist. Regarding Leonardo’s anatomical drawings, apart from human anatomy, he also depicted some animal species. This comparative [...] Read more.
Leonardo da Vinci was one of the most influencing personalities of his time, the perfect representation of the ideal Renaissance man, an expert painter, engineer and anatomist. Regarding Leonardo’s anatomical drawings, apart from human anatomy, he also depicted some animal species. This comparative study focused only on two species: Bears and horses. He produced some anatomical drawings to illustrate the dissection of “a bear’s foot” (Royal Collection Trust), previously described as “the left leg and foot of a bear”, but considering some anatomical details, we concluded that they depict the bear’s right pelvic limb. This misconception was due to the assumption that the bear’s digit I (1st toe) was the largest one, as in humans. We also analyzed a rough sketch (not previously reported), on the same page, and we concluded that it depicts the left antebrachium (forearm) and manus (hand) of a dog/wolf. Regarding Leonardo’s drawing representing the horse anatomy “The viscera of a horse”, the blood vessel arrangement and other anatomical structures are not consistent with the structure of the horse, but are more in accordance with the anatomy of a dog. In addition, other drawings comparing the anatomy of human leg muscles to that of horse pelvic limbs were also discussed in motion. Full article
(This article belongs to the Special Issue Advances in Animal Anatomy)
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Figure 1

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