Ultrastructure of the Odontocete organ of Corti: scanning and transmission electron microscopy
The morphological study of the Odontocete organ of Corti, together with possible alterations associated with damage from sound exposure, represents a key conservation approach to assess the effects of acoustic pollution on marine ecosystems. By collaborating with stranding networks from several Euro...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/330812 2023-07-23T04:21:24+02:00 Ultrastructure of the Odontocete organ of Corti: scanning and transmission electron microscopy Morell, Maria Lenoir, Marc Shadwick, Robert E Jauniaux, Thierry Dabin, Willy Begeman, Lineke Ferreira, Marisa Maestre, Iranzu Degollada, Eduard Hernandez-Milian, Gema Cazevieille, Chantal Fortuño, José-Manuel Vogl, Wayne Puel, Jean-Luc André, Michel Veterinair Pathologisch Diagnostisch Cnt dPB CR 2015-02-15 application/pdf https://dspace.library.uu.nl/handle/1874/330812 en eng 0021-9967 https://dspace.library.uu.nl/handle/1874/330812 info:eu-repo/semantics/ClosedAccess inner ear cochlea cetacean morphology acoustic trauma Article 2015 ftunivutrecht 2023-07-02T01:41:13Z The morphological study of the Odontocete organ of Corti, together with possible alterations associated with damage from sound exposure, represents a key conservation approach to assess the effects of acoustic pollution on marine ecosystems. By collaborating with stranding networks from several European countries, 150 ears from 13 species of Odontocetes were collected and analyzed by scanning (SEM) and transmission (TEM) electron microscopy. Based on our analyses, we first describe and compare Odontocete cochlear structures and then propose a diagnostic method to identify inner ear alterations in stranded individuals. The two species analyzed by TEM (Phocoena phocoena and Stenella coeruleoalba) showed morphological characteristics in the lower basal turn of high-frequency hearing species. Among other striking features, outer hair cell bodies were extremely small and were strongly attached to Deiters cells. Such morphological characteristics, shared with horseshoe bats, suggest that there has been convergent evolution of sound reception mechanisms among echolocating species. Despite possible autolytic artifacts due to technical and experimental constraints, the SEM analysis allowed us to detect the presence of scarring processes resulting from the disappearance of outer hair cells from the epithelium. In addition, in contrast to the rapid decomposition process of the sensory epithelium after death (especially of the inner hair cells), the tectorial membrane appeared to be more resistant to postmortem autolysis effects. Analysis of the stereocilia imprint pattern at the undersurface of the tectorial membrane may provide a way to detect possible ultrastructural alterations of the hair cell stereocilia by mirroring them on the tectorial membrane. Article in Journal/Newspaper Phocoena phocoena Utrecht University Repository |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
inner ear cochlea cetacean morphology acoustic trauma |
spellingShingle |
inner ear cochlea cetacean morphology acoustic trauma Morell, Maria Lenoir, Marc Shadwick, Robert E Jauniaux, Thierry Dabin, Willy Begeman, Lineke Ferreira, Marisa Maestre, Iranzu Degollada, Eduard Hernandez-Milian, Gema Cazevieille, Chantal Fortuño, José-Manuel Vogl, Wayne Puel, Jean-Luc André, Michel Ultrastructure of the Odontocete organ of Corti: scanning and transmission electron microscopy |
topic_facet |
inner ear cochlea cetacean morphology acoustic trauma |
description |
The morphological study of the Odontocete organ of Corti, together with possible alterations associated with damage from sound exposure, represents a key conservation approach to assess the effects of acoustic pollution on marine ecosystems. By collaborating with stranding networks from several European countries, 150 ears from 13 species of Odontocetes were collected and analyzed by scanning (SEM) and transmission (TEM) electron microscopy. Based on our analyses, we first describe and compare Odontocete cochlear structures and then propose a diagnostic method to identify inner ear alterations in stranded individuals. The two species analyzed by TEM (Phocoena phocoena and Stenella coeruleoalba) showed morphological characteristics in the lower basal turn of high-frequency hearing species. Among other striking features, outer hair cell bodies were extremely small and were strongly attached to Deiters cells. Such morphological characteristics, shared with horseshoe bats, suggest that there has been convergent evolution of sound reception mechanisms among echolocating species. Despite possible autolytic artifacts due to technical and experimental constraints, the SEM analysis allowed us to detect the presence of scarring processes resulting from the disappearance of outer hair cells from the epithelium. In addition, in contrast to the rapid decomposition process of the sensory epithelium after death (especially of the inner hair cells), the tectorial membrane appeared to be more resistant to postmortem autolysis effects. Analysis of the stereocilia imprint pattern at the undersurface of the tectorial membrane may provide a way to detect possible ultrastructural alterations of the hair cell stereocilia by mirroring them on the tectorial membrane. |
author2 |
Veterinair Pathologisch Diagnostisch Cnt dPB CR |
format |
Article in Journal/Newspaper |
author |
Morell, Maria Lenoir, Marc Shadwick, Robert E Jauniaux, Thierry Dabin, Willy Begeman, Lineke Ferreira, Marisa Maestre, Iranzu Degollada, Eduard Hernandez-Milian, Gema Cazevieille, Chantal Fortuño, José-Manuel Vogl, Wayne Puel, Jean-Luc André, Michel |
author_facet |
Morell, Maria Lenoir, Marc Shadwick, Robert E Jauniaux, Thierry Dabin, Willy Begeman, Lineke Ferreira, Marisa Maestre, Iranzu Degollada, Eduard Hernandez-Milian, Gema Cazevieille, Chantal Fortuño, José-Manuel Vogl, Wayne Puel, Jean-Luc André, Michel |
author_sort |
Morell, Maria |
title |
Ultrastructure of the Odontocete organ of Corti: scanning and transmission electron microscopy |
title_short |
Ultrastructure of the Odontocete organ of Corti: scanning and transmission electron microscopy |
title_full |
Ultrastructure of the Odontocete organ of Corti: scanning and transmission electron microscopy |
title_fullStr |
Ultrastructure of the Odontocete organ of Corti: scanning and transmission electron microscopy |
title_full_unstemmed |
Ultrastructure of the Odontocete organ of Corti: scanning and transmission electron microscopy |
title_sort |
ultrastructure of the odontocete organ of corti: scanning and transmission electron microscopy |
publishDate |
2015 |
url |
https://dspace.library.uu.nl/handle/1874/330812 |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_relation |
0021-9967 https://dspace.library.uu.nl/handle/1874/330812 |
op_rights |
info:eu-repo/semantics/ClosedAccess |
_version_ |
1772186928720904192 |