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Letteratura scientifica selezionata sul tema "Fungiform papilla"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 20 febbraio 2023

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Articoli di riviste sul tema "Fungiform papilla"

Kinnamon, J. C., e S. M. Royer. "Synaptic organization of vertebrate taste buds". Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 144–45. http://dx.doi.org/10.1017/s0424820100168451.

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The vertebrate taste bud is an end organ specialized to detect and transduce aqueous chemical stimuli. In mammals most taste buds are located on the tongue. Lingual taste buds are typically distributed over three fields or papillae: fungiform, foliate and circumvallate papillae. Fungiform papillae are found on raised eminences near the tip of the tongue. Each fungiform papilla contains from one to several taste buds. Foliate taste buds are located in epithelial folds (foliate papillae) of the posterolateral surfaces of the tongue. In the rear of the tongue circumvallate taste buds line the walls or trenches surrounding the mushroom-shaped circumvallate (= vallate) papillae. In fish, taste buds are more widely distributed, being located on the tongue, lips, barbels, gill rakers, palatal organ and the body surface. A typical vertebrate taste bud comprises 50 to 150 spindle-shaped cells that lie atop the basal lamina of the tongue.In most mammals, the taste bud cells can be classified as dark or light cells, based on the electron-density of their cytoplasm.

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Goodarzi, N., e M. Azarhoosh. "Morpholoical Study of the Brandt’s Hedgehog, Paraechinus hypomelas (Eulipotyphla, Erinaceidae), Tongue". Vestnik Zoologii 50, n. 5 (1 ottobre 2016): 457–66. http://dx.doi.org/10.1515/vzoo-2016-0052.

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Abstract The morphology and histological structure of two adult Brandt’s hedgehog, Paraechinus hypomelas, (Brandt, 1836) tongue were examined by light and scanning electron microscopy. On the dorsal surface of the tongue, three types of papillae were observed: filiform, fungiform and vallate papillae. Apex and corpus of the tongue as well as the lateral surface of the corpus were covered with numerous filiform papillae with bifurcated tip, while the epithelium lining the ventral lingual surface was free from papillae. Discoid shape fungiform papillae were scattered over the entire surface of the lingual apex, corpus and lateral surface uniformly between the filiform ones without regional variation in number and size. Three elliptical or oval vallate papillae in an inverted triangle form were found on the root of the tongue. Each papilla had a lobulated and very irregular dorsal surface. Both fungiform and vallate papillae contain taste buds. The foliate papillae was absent. Overall, the present findings reveal that despite some similarities, the lingual papillae of the Brandt’s hedgehog as an omnivore animal has spices-specific characteristics compare to the Erinaceous auritus as an insectivore species. This finding provides a set of basic data about the morphology of tongue and its lingual papillae in Brandt’s hedgehog.

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Saito, Takehisa, Tetsufumi Ito, Norihiko Narita, Takechiyo Yamada e Yasuhiro Manabe. "Light and Electron Microscopic Observation of Regenerated Fungiform Taste Buds in Patients with Recovered Taste Function after Severing Chorda Tympani Nerve". Annals of Otology, Rhinology & Laryngology 120, n. 11 (novembre 2011): 713–21. http://dx.doi.org/10.1177/000348941112001104.

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Objectives: The aim of this study was to evaluate the mean number of regenerated fungiform taste buds per papilla and perform light and electron microscopic observation of taste buds in patients with recovered taste function after severing the chorda tympani nerve during middle ear surgery. Methods: We performed a biopsy on the fungiform papillae (FP) in the midlateral region of the dorsal surface of the tongue from 5 control volunteers (33 total FP) and from 7 and 5 patients with and without taste recovery (34 and 29 FP, respectively) 3 years 6 months to 18 years after surgery. The specimens were observed by light and transmission electron microscopy. The taste function was evaluated by electrogustometry. Results: The mean number of taste buds in the FP of patients with completely recovered taste function was significantly smaller (1.9 ± 1.4 per papilla; p < 0.01) than that of the control subjects (3.8 ± 2.2 per papilla). By transmission electron microscopy, 4 distinct types of cell (type I, II, III, and basal cells) were identified in the regenerated taste buds. Nerve fibers and nerve terminals were also found in the taste buds. Conclusions: It was clarified that taste buds containing taste cells and nerve endings do regenerate in the FP of patients with recovered taste function.

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Liu, Hong-Xiang, Ann M. Staubach Grosse, Katherine D. Walton, Daniel A. Saims, Deborah L. Gumucio e Charlotte M. Mistretta. "WNT5a in Tongue and Fungiform Papilla Development". Annals of the New York Academy of Sciences 1170, n. 1 (luglio 2009): 11–17. http://dx.doi.org/10.1111/j.1749-6632.2009.04369.x.

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Murayama, N. "Interaction among different sensory units within a single fungiform papilla in the frog tongue." Journal of General Physiology 91, n. 5 (1 maggio 1988): 685–701. http://dx.doi.org/10.1085/jgp.91.5.685.

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The possible interaction among different sensory units in the frog tongue was studied using several single papillae dually innervated by the medial and lateral branches of the glossopharyngeal (IXth) nerve. The afferent activity in one branch exposed to NaCl stimulation of the papilla revealed marked inhibition after antidromic electrical stimulation (100 Hz, 30 s, and 3 V) of the other branch. The degree of inhibition depended on the number of sensory responses observed in the electrically stimulated branch as well as the nature of the stimulated sensory units. Statistical analysis suggested that antidromic activation of gustatory units conducting the responses to NaCl and quinine and slowly adapting mechanosensitive units produced a large antidromic inhibition amounting to 19-25%, but that of gustatory units conducting the responses to acetic acid and rapidly adapting mechanosensitive units gave rise to only a slight inhibition. To examine the differential effects of these sensory units in antidromic inhibition, antidromic impulses were evoked by chemical stimulation of the adjacent papilla neuronally connected with the dually innervated papilla under study. Antidromic volleys of impulses elicited by NaCl or quinine stimulation produced a large inhibition of the afferent activity in the other branch, as induced by NaCl stimulation of the dually innervated papilla. Plausible mechanisms of synaptic interaction in peripheral gustatory systems are considered.

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OĞRUM, Atiye, Zennure TAKÇI e Havva YILDIZ SEÇKİN. "Pigmented Fungiform Papillae: Case Report and Review of the Literature". Turkiye Klinikleri Journal of Dermatology 28, n. 1 (2018): 32–34. http://dx.doi.org/10.5336/dermato.2018-60677.

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Melis, Melania, Mariano Mastinu, Lala Chaimae Naciri, Patrizia Muroni e Iole Tomassini Barbarossa. "Associations between Sweet Taste Sensitivity and Polymorphisms (SNPs) in the TAS1R2 and TAS1R3 Genes, Gender, PROP Taster Status, and Density of Fungiform Papillae in a Genetically Homogeneous Sardinian Cohort". Nutrients 14, n. 22 (19 novembre 2022): 4903. http://dx.doi.org/10.3390/nu14224903.

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Individual differences in sweet taste sensitivity can affect dietary preferences as well as nutritional status. Despite the lack of consensus, it is believed that sweet taste is impacted by genetic and environmental variables. Here we determined the effect of well-established factors influencing the general taste variability, such as gender and fungiform papillae density, specific genetic variants (SNPs of TAS1R2 and TAS1R3 receptors genes), and non-specific genetic factors (PROP phenotype and genotype), on the threshold and suprathreshold sweet taste sensitivity. Suprathreshold measurements showed that the sweet taste response increased in a dose-dependent manner, and this was related to PROP phenotype, gender, rs35874116 SNP in the TAS1R2 gene, and rs307355 SNP in the TAS1R3 gene. The threshold values and density of fungiform papillae exhibited a strong correlation, and both varied according to PROP phenotype. Our data confirm the role of PROP taste status in the sweet perception related to fungiform papilla density, show a higher sweet sensitivity in females who had lower BMI than males, and demonstrate for the first time the involvement of the rs35874116 SNP of TAS1R2 in the sweet taste sensitivity of normal weight subjects with body mass index (BMI) ranging from 20.2 to 24.8 kg/m2. These results may have an important impact on nutrition and health mostly in subjects with low taste ability for sweets and thus with high vulnerability to developing obesity or metabolic disease.

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Fukasawa, Takashim, Takashi Kumazawa, Takenori Miyamoto, Rie Fujiyama, Yukio Okada e Toshihide Sato. "Reconstituted Ion Channels of Frog Fungiform Papilla Cell Membrane". Zoological Science 18, n. 3 (aprile 2001): 299–307. http://dx.doi.org/10.2108/zsj.18.299.

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Martins, D. M., L. L. Pinheiro, V. C. Ferreira, A. M. Costa, A. R. Lima, R. E. G. Ricci, M. A. Miglino e E. Branco. "Tongue papillae morphology of brown-throated sloth Bradypus variegatus (SCHINZ, 1825)". Arquivo Brasileiro de Medicina Veterinária e Zootecnia 66, n. 5 (ottobre 2014): 1479–86. http://dx.doi.org/10.1590/1678-6343.

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The Bradypusvariegatus inhabits the forests of South America and feeds from leaves, branches and sprouts from different plants. Due to its diet and the lack of literature on the morphological aspect of Xenarthras, five Bradypusvariegatus tongues from animals which died from natural causes were evaluated, and they came from Pará State Museum Emílio Goeldi and were donated to the Laboratory of Animal Morphological Research (LaPMA) from UFRA, for revealing the different types of papillae and epithelial-connective tissue. Macroscopically, the tongues presented elongated shape, rounded apex, body, root, median sulcus in the root's apex, and two vallate papillae. The mucous membrane of the tongue revealed a keratinized stratified pavement epithelium, while the ventral surface of the tongue was thin and smooth, not provided with any type of papillae. However, the dorsal surface of the tongue was irregular with the presence of three types of papillae: filiform, fungiform and vallate papillae. The filiform papillae found were of a simple type, presenting a rounded base, irregularly distributed with a larger concentration and development on the tongue's apex and body. The fungiform papilla showed a practically smooth surface with irregular format, with the presence of gustatory pores; these were found all over the dorsal surface, with larger concentration at the rostral part of the apex. Only two vallate papillae were observed disposed in the root of the tongue, surrounded by a deep groove, and revealing several taste buds. The tongues from Bradypusvariegatus presented gustatory papillae similar to the ones described for other Xenarthras species and wild mammals.

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Mistretta, Charlotte M., e Robert M. Bradley. "The fungiform papilla is a complex, multimodal, oral sensory organ". Current Opinion in Physiology 20 (aprile 2021): 165–73. http://dx.doi.org/10.1016/j.cophys.2021.01.012.

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Più fonti

Tesi sul tema "Fungiform papilla"

Segovia, Carolina. "An anatomical study of the development of the sense of taste /". View thesis View thesis, 2001. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030505.141416/index.html.

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Thesis (M.Sc.) (Honours) -- University of Western Sydney, Hawkesbury, 2001.
A thesis submitted in fulfilment of the requirements for the degree of Masters of Science (Honours) in the Centre for Advance [sic.] Food Research, University of Western Sydney, Hawkesbury Campus, July 2001. Bibliography : leaves 98-110.

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Segovia, Carolina. "An anatomical study of the development of the sense of taste". Thesis, View thesis View thesis, 2001. http://handle.uws.edu.au:8081/1959.7/111.

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The aim of this study was to quantify the density of taste pores on the anterior region of the tongue, in adult males and 8 to 9 year old boys. Earlier studies had shown that, although 8 to 9 year olds were poorer than adults at sensing the tastant sucrose using a whole mouth procedure, localised regions of the tongue in male children were more sensitive than equivalent regions in adults. This study aims to detemine whether the age differences in sensitivity is related to a difference in taste pore density. Two areas of the tongue, for which children had previously been shown to have higher sensitivity than adults, were examined using a videomicrosocpy technique and the number and diameter of taste pores were measured. Children were found to have a greater density of taste pores, however the number of taste pores per papilla were similar in children and adults. It was found to be likely that the greater sensitivity of localised areas on the children's tongue is due to a greater taste pore density. The reduced sensitivity reported using whole mouth stimulation may be due to a reduced capacity to assimilate taste input from the whole mouth or due to different relative contributions to whole-mouth taste from the various receptive fields in the mouth.

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Segovia, Carolina, of Western Sydney Hawkesbury University, of Science Technology and Environment College e of Science Food and Horticulture School. "An anatomical study of the development of the sense of taste". THESIS_CSTE_SFH_Segovia_C.xml, 2001. http://handle.uws.edu.au:8081/1959.7/111.

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Bangcuyo, Ronald G. "Lingual tactile sensitivity: Effect of age, gender, fungiform papillae density, and temperature". The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1436390197.

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Berger, Erin. "The Relationship Between Fungiform Papillae Density, PTC Supertasting, Food Preferences, and Eating Behaviors in College Students". Wittenberg University Honors Theses / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wuhonors1338483266.

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Alport, Laura Jean. "Lingual fungiform papillae and teh evolution of the primate gustatory system". 2009. http://hdl.handle.net/2152/11636.

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Among humans, the density of lingual fungiform papillae (DFP) is correlated with taste sensitivity. The purpose of this dissertation was to investigate the evolution of the primate gustatory system through a comparative analysis of DFP. This investigation was conducted in three separate studies. The first study took a broad perspective incorporating data from 37 primate species to assess the relationships among DFP, body mass, taste sensitivity, and diet. Among the major findings of this first study: (1) Sucrose sensitivity was negatively correlated with DFP and positively correlated with papilla area. (2) Sucrose sensitivity was not correlated with the percent of leaves or fruit in the diet. (3) DFP and papilla area were correlated with diet. (4) The relationships between fungiform papillae and diet differed among different taxonomic groups. The second study of DFP investigated whether there are sex differences in the DFP of non-human primates, as there are in humans. In all five primate species investigated, females had higher mean DFPs than males. These sex differences were significant in Pan troglodytes and Cebus apella, and not significant in Alouatta palliata, Cercopithecus aethiops, or Varecia variegata. Pan, Cebus, and Homo share large relative brain sizes with associated life history parameters making each offspring very costly. Accordingly it was suggested that sex differences in DFP may be due to the particularly high risk of lacking nutrients or ingesting toxins for females of these three species. The third study was a comparison of phenylthiocarbamide (PTC) taste ability and DFP in humans and chimpanzees. The major questions addressed in this study were (1) Is DFP correlated with PTC phenotype in chimpanzees as it is in humans? (2) Are there sex differences in PTC genotype and phenotype as there are in DFP? Although females had greater DFPs than males, and significantly more females had the genotype for higher PTC taste sensitivity, there was no correlation between DFP and PTC phenotype. Several explanations for the differences between human and chimpanzee results were offered, including small sample sizes for chimpanzees and greater accuracy in determining PTC sensitivity among humans.
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Capitoli di libri sul tema "Fungiform papilla"

Miller, Inglis J. "Structural and Functional Features of Human Fungiform Papillae". In Olfaction and Taste XI, 26. Tokyo: Springer Japan, 1994. http://dx.doi.org/10.1007/978-4-431-68355-1_12.

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Huang, Bo, e Naimin Li. "Tongue Image Identification System on Congestion of Fungiform Papillae (CFP)". In Lecture Notes in Computer Science, 73–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13923-9_8.

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Inoue, Katsuhiro, e Yasuyuki Kitada. "Parasympathetic Postganglionic Nerve Fibers in the Fungiform Papillae of the Frog". In Olfaction and Taste XI, 21. Tokyo: Springer Japan, 1994. http://dx.doi.org/10.1007/978-4-431-68355-1_7.

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Atti di convegni sul tema "Fungiform papilla"

Rios, H. V., E. Valencia, F. M. Montes, A. Marin, E. Silva e R. Herrera. "Recognition of fungiform papillae in tongue images". In 2012 22nd International Conference on Electrical Communications and Computers (CONIELECOMP). IEEE, 2012. http://dx.doi.org/10.1109/conielecomp.2012.6189917.

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