Results 121 to 130 of about 33,134 (302)

Sequestrum of Semicircular Canals [PDF]

open access: yesProceedings of the Royal Society of Medicine, 1926
W. J. Macdonald, Archer Ryland
openaire   +3 more sources

Size, not phylogeny, explains the morphology of the endosseous labyrinth in the crown clade Crocodylia

open access: yesJournal of Anatomy, Volume 246, Issue 4, Page 558-574, April 2025.
Here, we present the most complete dataset to date on the endosseous labyrinths of extant crocodylians. Using 3D geometric morphometrics, we show that allometry constitutes a major contributor of the shape variation of the crocodylian endosseous labyrinths and that the development of this structure is likely linked to the braincase conformation, in all
Yohan Pochat‐Cottilloux   +9 more
wiley   +1 more source

Intractable Persistent Direction-Changing Geotropic Nystagmus Improved by Lateral Semicircular Canal Plugging

open access: yesCase Reports in Otolaryngology, 2015
Antigravitational deviation of the cupula of the lateral semicircular canal, which is also called light cupula, evokes persistent direction-changing geotropic nystagmus with a neutral point. No intractable cases of this condition have been reported.
Toru Seo, Kazuya Saito, Katsumi Doi
doaj   +1 more source

A late role for bmp2b in the morphogenesis of semicircular canal ducts in the zebrafish inner ear.

open access: yesPLoS ONE, 2009
BackgroundThe Bone Morphogenetic Protein (BMP) genes bmp2 and bmp4 are expressed in highly conserved patterns in the developing vertebrate inner ear. It has, however, proved difficult to elucidate the function of BMPs during ear development as mutations ...
Katherine L Hammond   +8 more
doaj   +1 more source

Semicircular canal morphology in Rodentia and its relationship to locomotion

open access: yesJournal of Anatomy, EarlyView.
Here, we present a selection of rodent inner ear 3D models in the lateral view, with rodents from seven locomotor categories (left to right: fossorial, semifossorial, semiaquatic, terrestrial, ricochetal, arboreal, and gliding). Semicircular canal (SCC) morphology, including radius of curvature and shape, can be differentiated between specialized forms
Lily Hou   +4 more
wiley   +1 more source

Almost billfish: convergent longirostry, micro‐dentition, and possible glandular sinuses in a large teleost fish from the Upper Cretaceous of Northern Italy

open access: yesJournal of Anatomy, EarlyView.
A fossil rostrum fragment of a large teleost fish from the Upper Cretaceous of Northern Italy reveals remarkable anatomical convergences with Cenozoic and Recent billfishes (marlins, swordfishes, and akin). The extinct group Plethodidae independently acquired a long snout, micro‐teeth, and oil‐gland sinuses well before the evolution of true billfishes.
Giovanni Serafini   +5 more
wiley   +1 more source

La dehiscencia del canal semicircular superior como forma de presentación de la vestibulopatía periférica

open access: yesMedicentro, 2017
Introducción: la dehiscencia del canal semicircular superior es una alteración del oído interno caracterizada por la ausencia parcial de la cobertura ósea de dicho canal. En condiciones normales, el oído interno solamente tiene dos ventanas: la oval y la
Ariel Cabrera Pérez   +2 more
doaj  

Three-dimensional characteristics of nystagmus induced by low frequency in semicircular canals of healthy young people

open access: yesFrontiers in Neuroscience
ObjectiveThe study aimed to analyze the three-dimensional characteristics of nystagmus induced by different semicircular canal combinations in healthy young people, and to determine the reference range of nystagmus slow phase velocity (SPV) and its ...
Xiaobang Huang   +39 more
doaj   +1 more source

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