Function-related morphological characteristics and specialized structures of the avian tongue

Erdoğan, Serkan; Iwasaki, Shigeo

doi:10.1016/j.aanat.2013.09.005

Cited by 52 publications

(88 citation statements)

References 58 publications

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“…The canary tongue has thicker epithelium on the dorsal surface compared with the ventral surface, and this gradually decreases in thickness towards radix, and these findings are similar to those reported in the literature [18,19,24,26,29]. Since the epithelial keratinization of the canary tongue is limited, it may suggest that food stays limited period on dorsal surface of the tongue is limited.…”

Section: Discussionsupporting

confidence: 80%

“…Although no spinous papillae (or any other specific structures which have been reported as modification in tongues used for collecting food [18] were observed on the dorsal surface of the tongue, there were needle-like apical lateral side processes. The canary tongue is not protrusible and is similar to tongues specialized for collecting food in the classification of Erdogan and Iwasaki [18]. Needle-like apical lateral side processes have forward facing ends not backward facing and in this way are different from geese which have hair-like side extensions known as papillae filiformis.…”

Section: Discussionmentioning

confidence: 93%

“…There are intraepithelial gustatory buds in many avian species too [18]. According to the histological examination results of this study there were no taste buds in the epithelium in any part of the tongue despite serial sections taken from the whole tongue being examined.…”

Section: Discussionmentioning

confidence: 97%

“…Canary saliva seems to have a protective effect on oral mucosa since it helps to hydrate the mucosal surface of the tongue and facilitate ingestion as reported in the literature [18]. The question of whether it has an effect on taste perception in canaries, which have no lingual taste buds, remains to be answered.…”

Section: Discussionmentioning

confidence: 98%

“…Various studies performed on different avian species have described the shape and the covering epithelial surface of tongue and proposed that these features are closely associated with nutritional habits. In other words, the morphology of the tongue reflects the functional and characteristic adaptations [18,26]. In comparison with morphological studies, there are limited number of histochemical studies in which the features of lingual salivary glands have been examined [1,3,5,7,19,45].…”

Section: Introductionmentioning

confidence: 99%

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Tongue and lingual salivary glands of the canary: scanning electron microscopy and histochemical study

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Section: Discussionsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Tongue and lingual salivary glands of the canary: scanning electron microscopy and histochemical study

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Evolutionary insights from an anatomical network analysis of the hyolaryngeal apparatus in extant archosaurs (birds and crocodilians)

Yoshida

Kobayashi

Fiorillo

2023

The Anatomical Record

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Adaptive radiation of archosaurs, represented by crocodilians, non-avian dinosaurs, and birds, since the Mesozoic has been studied mainly based on their major skeletal elements (skull, vertebrae, and limbs). However, little is known about the evolution of their hyolaryngeal apparatus, which is involved with feeding, respiration, and vocalization, because of poor fossil preservation and the difficulty in determining the musculoskeletal homology of the apparatus. Network analysis is a framework to quantitatively characterize the topological organization of anatomical structures for comparing structural integration and modularity regardless of ambiguous homology. Herein, we modeled the musculoskeletal system of hyolarynx in six species of extant archosaurs and its sister-taxon turtle, and conducted a network analysis using network parameters, modular partition, and bone centrality in a phylogenetic framework. The network parameters reveal that ancestral archosaurs have reduced the numbers of elements and links and acquired complex networks as a whole domain with strong modularity in the hyolarynx. Furthermore, the modular partition and centrality reveal that the hyoids are highly evolvable, while the larynx is constrained and less evolvable.The archosaur hyolarynx exhibits different evolutionary trends: crocodilians with the system integration, basihyal simplification, and ceratobranchial centralization; and birds with the simplicity, weak integration, and modularity of the hyolarynx, laryngeal integration with cricoid centrality, and tongue-module expansion with the acquisition of paraglossal. Four hyolaryngeal bones (ceratobranchial, basihyal, paraglossal, and cricoid) have played important roles in archosaur evolution, and their fossil records are keys to understanding the two major archosaur lineages toward crocodilians and birds.

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The sensory trigeminal complex and the organization of its primary afferents in the zebra finch (Taeniopygia guttata)

Faunes

Wild

2017

J of Comparative Neurology

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Our knowledge of the avian sensory trigeminal system has been largely restricted to the principal trigeminal nucleus (PrV) and its ascending projections to the forebrain. Studies addressing the cytoarchitecture and organization of afferent input to the sensory trigeminal complex, which includes both the PrV and the nuclei of the descending trigeminal tract (nTTD), have only been performed in pigeons and ducks. Here we extend such an analysis to a songbird, the zebra finch (Taeniopygia guttata). We describe the cytoarchitecture of the sensory trigeminal complex, the patterns of calbindin-like and substance P-like immunoreactivity, and the organization of afferents from the three branches of the trigeminal nerve and from the lingual branch of the hypoglossal nerve. On the basis of cytoarchitecture and immunohistochemistry, the sensory trigeminal column can be subdivided from caudal to rostral, as in other species, into cervical dorsal horn, subnucleus caudalis, subnucleus interpolaris, subnucleus oralis, and nucleus principalis. The relative positions of the terminal fields of the three trigeminal branches move from medial to lateral in the dorsal horn to dorsomedial to ventrolateral in nTTD, whereas in PrV there is considerable overlap of mandibular and ophthalmic terminal fields, with only a small maxillary input ventrally. The hypoglossal afferents, which terminate medially in the dorsal horn and dorsolaterally in nTTD, terminate in specific cell groups in the dorsolateral nTTDo and in PrV. This work sets the grounds for further analyses of the ascending connections of the nTTD and the afferents from the syrinx to the trigeminal sensory column.

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Function-related morphological characteristics and specialized structures of the avian tongue

Cited by 52 publications

References 58 publications

Tongue and lingual salivary glands of the canary: scanning electron microscopy and histochemical study

Tongue and lingual salivary glands of the canary: scanning electron microscopy and histochemical study

Evolutionary insights from an anatomical network analysis of the hyolaryngeal apparatus in extant archosaurs (birds and crocodilians)

The sensory trigeminal complex and the organization of its primary afferents in the zebra finch (Taeniopygia guttata)

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