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9 záznamů v PubMed Filtry

Článek

Morphological adaptation of the tongue of okapi (Okapia johnstoni Artiodactyla, Giraffidae)-Anatomy, histology, and ultrastructure

Goździewska-Harłajczuk, Karolina
Autor Goździewska-Harłajczuk, Karolina ORCID Department of Biostructure and Animal Physiology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wroclaw, Poland
Hamouzová, Pavla
Autor Hamouzová, Pavla ORCID Department of Physiology, University of Veterinary Sciences Brno, Brno, Czech Republic
Klećkowska-Nawrot, Joanna
Autor Klećkowska-Nawrot, Joanna ORCID Department of Biostructure and Animal Physiology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Wroclaw, Poland
Čížek, Petr
Autor Čížek, Petr ORCID Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Veterinary Sciences Brno, Brno, Czech Republic

Journal of morphology. 2024 Jun ; 285 (6) : e21743.

J Morphol
ISSN 1097-4687 | 0022-2887
Zdroj

The aim of this study was to describe the morphology of the tongue of the okapi, and to compare the results with other ruminants including browsers, intermediates and grazers. The material was collected post-mortem from two animals from a Zoological Garden. The structure of the okapi tongue, focusing of the shape of the tongue, lingual surface, its papillae and lingual glands, was examined using gross morphology, light and polarized microscopy, and by scanning electron microscopy. The okapi tongue was characterized by dark pigmentation on the lingual dorsum (except lingual torus) and on the whole ventral surface. Two types of filiform papillae were observed, with additional, even 6-8 projections at their base. The round fungiform papillae were present at a higher density, up to 16/cm2, on the ventro-lateral area of the lingual apex. Round and elongate vallate papillae were arranged in two parallel lines between the body and root of the tongue. Numerous taste buds were detected within the epithelium of their vallum, while fungiform papillae had sparse taste buds. A lack of foliate papillae was noted. Very small conical papillae, some lenticular in shape, were present on the lingual torus. Thick collagen type I fibers were dominant over collagen type III fibers in the connective tissue of the lingual papillae. The mucous acini units were dominant among lingual glands, indicating that the secretion of okapi lingual glands was mostly mucous. In many aspects, the tongue of okapi resembles the tongue of other ruminants. The specific lingual shape and lingual surface, together with the lingual glands, support the processing of plant food, such as young and soft leaves. Although okapi tongue is characterized by smaller conical papillae compared to other ruminants, its high number of vallate papillae is similar that found in other browsers, intermediate and grazers. Thus the number of gustatory papillae rather indicates that this feature is not related to the type of feeding.

Klíčová slova
Okapia johnstoni, adaptation, histochemistry, histology, lingual glands, morphology, oral cavity, scanning electron microscopy, selective browser, type I collagen fiber, type III collagen fiber,
MeSH
Artiodactyla anatomie a histologie MeSH
chuťové pohárky * ultrastruktura anatomie a histologie MeSH
fyziologická adaptace MeSH
jazyk * ultrastruktura anatomie a histologie MeSH
mikroskopie elektronová rastrovací MeSH
žirafy anatomie a histologie MeSH
zvířata MeSH
Check Tag
zvířata MeSH
Publikační typ
časopisecké články MeSH

Článek

Light and scanning electron microscopy of the tongue of a degu (Octodon degus)

Anatomical science international. 2017 Sep ; 92 (4) : 493-499. [epub] 20160421

Anat Sci Int
ISSN 1447-073X
Zdroj

The tongue of an adult degu was examined by light and scanning electron microscopy. It consists of an apex, corpus, and radix and contains a lingual prominence. The aim of this study was to describe the course of muscle fascicles of the proper lingual muscle, the presence and nature of the lingual salivary glands, and particularly the appearance and distribution of the lingual papillae. Three major types of papillae have been observed: filiform, conical, and vallate. The dorsal surface of the lingual apex extends in caudally bent filiform papillae with two spines. The lingual corpus bears long filiform papillae with a single tip. The lingual radix contains crown-like papillae in the region of the prominence and conical papillae in the remaining areas. Two oval vallate papillae were discovered caudally on the lingual radix. This first description of the lingual structures in a degu could be used for comparative studies or as basic data for differentiation of lingual morphology in this species.

Klíčová slova
Degu, Lingual papillae, Rodents, Scanning electron microscopy, Tongue,
MeSH
jazyk anatomie a histologie ultrastruktura MeSH
mikroskopie elektronová rastrovací * MeSH
mikroskopie MeSH
Octodon anatomie a histologie MeSH
zvířata MeSH
Check Tag
mužské pohlaví MeSH
zvířata MeSH
Publikační typ
časopisecké články MeSH

Článek

Influence of tongue position on the determination of tooth shade

The Journal of prosthetic dentistry. 2017 Feb ; 117 (2) : 289-293. [epub] 20160916

J Prosthet Dent
ISSN 1097-6841 | 0022-3913
Zdroj

STATEMENT OF PROBLEM: Dentists frequently use electronic devices to determine tooth color. However, neither the instructions for these devices nor the accompanying brochures refer to the environmental conditions required at the point of measurement. PURPOSE: The purpose of this multicenter prospective clinical study was to reveal whether a change in the oral background influences tooth color determination. MATERIAL AND METHODS: Students (N=42) at the dental clinic in Berlin, Leipzig, Greifswald and Olomouc (women n=27, men n=15) participated in this study. It was their first contact with the spectral photometer (Easyshade Advance 4.0; VITA Zahnfabrik). After a short introduction on how to use the device, the students made 1-point measurements on the same patient on the maxillary central incisor. In the first measurement, the patient's mouth was open, and the palatal surface uncovered. In the second measurement, the patient's mouth was closed slightly, and the tongue pressed on the lingual surface of the maxillary central incisor. The mean ±SD and the 95% confidence interval (95 % CI) were calculated using the Student t test for each test series (α=.05). RESULTS: Statistical evaluation of the 2 measurements revealed changes in the L*a*b* values with a mean L*=0.204, a*=-0.351, and b*=0.02; a median of 0.4, -0.3, and -0.1, respectively; a ±SD of 2.37, 0.64, and 0.89, respectively; and 95% CIs of L*=-0.476 to 0.884, a*=-0.531 to -0.702, and b*=-0.23 to 0.52, respectively. These differences were not statistically significant (P>.05). The measurements of L*, a*, and b* with and without tongue coverage of the lingual surfaces of the maxillary teeth did not show any statistically significant differences (P=.663). CONCLUSIONS: The results demonstrate that the position of the tongue does not influence measurement accuracy during the application of the Easyshade Advance device.

Článek

Anatomical and histological observations on the tongue of one-humped camel, Camelus dromedarius

Functional and developmental morphology. 1991 ; 1 (3) : 23-6.

Funct Dev Morphol
ISSN 0862-8416
Zdroj

The camel has a typically elongated mammalian tongue, which tapers to a dorsally flattened tip. The filiform papillae are mostly of the simple type which are scattered over the dorsum and the lateral edges of the tongue. The fungiform papillae are scattered among the filiform papillae. Circumvallate papillae could be seen on the posterior of the tongue. The dorsum lingue is covered with cornified stratified squamous epithelium and inferior surface with non-cornified squamous epithelium. The tongue is richly innervated as is evidenced by the presence of numerous nerve fibres and ganglion cells at different levels.