Morphogenesis of the brain in the harbour porpoise
Abstract Morphogenesis of the brain in a cetacean species has been investigated by means of reconstructions from serial sections of successive prenatal stages of the harbour porpoise (Phocoena phocoena). Four specimens ranging from 10 to 46 mm crown‐rump length (CRL) were selected and three‐dimensio...
Published in: | Journal of Comparative Neurology |
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crwiley:10.1002/cne.902770108 2024-06-23T07:53:30+00:00 Morphogenesis of the brain in the harbour porpoise Buhl, Eberhard H. Oelschläger, Helmut A. 1988 http://dx.doi.org/10.1002/cne.902770108 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fcne.902770108 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fcne.902770108 https://onlinelibrary.wiley.com/doi/pdf/10.1002/cne.902770108 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Comparative Neurology volume 277, issue 1, page 109-125 ISSN 0021-9967 1096-9861 journal-article 1988 crwiley https://doi.org/10.1002/cne.902770108 2024-06-13T04:21:06Z Abstract Morphogenesis of the brain in a cetacean species has been investigated by means of reconstructions from serial sections of successive prenatal stages of the harbour porpoise (Phocoena phocoena). Four specimens ranging from 10 to 46 mm crown‐rump length (CRL) were selected and three‐dimensional reconstructions of the developing brains were obtained with the plate model method. External and internal characteristics, established as criteria for staging embryonic development of primates and rodents, revealed that a common ontogenetic plan regarding the chronological sequence of morphogenetic events exists in mammalian orders as different as primates and odontocetes. Comparison of the 10‐mm and 11.5‐mm CRL harbour porpoise brains with those in other mammalian embryos of a similar ontogenetic stage (stages 16 and 17) showed a high degree of correspondence in morphological features. This ontogenetic age group therefore might still be considered as a generalized mammalian one. However, during succeeding morphogenesis of the Phocoena brain, qualititative and quantitative divergences from other mammalian groups became manifest, such as those found in the 24‐mm CRL specimen (corresponding to mammalian stages 20, 21). Early foetuses of the harbour porpoise (46 and 65 mm CRL) already exhibited a variety of typical odontocete brain features, such as absence of olfactory bulb, thick cochlear nerve, and strong progression of brainstem structures. Morphogenesis of the harbour porpoise brain is discussed from a comparative perspective, incorporating the literature on the development of mammalian brains. Part of this study has been published in abstract form (Buhl and Oelschläger: Acta Anat. (Basel) 120: 15–16 (Abstract), '84. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena Wiley Online Library Journal of Comparative Neurology 277 1 109 125 |
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English |
description |
Abstract Morphogenesis of the brain in a cetacean species has been investigated by means of reconstructions from serial sections of successive prenatal stages of the harbour porpoise (Phocoena phocoena). Four specimens ranging from 10 to 46 mm crown‐rump length (CRL) were selected and three‐dimensional reconstructions of the developing brains were obtained with the plate model method. External and internal characteristics, established as criteria for staging embryonic development of primates and rodents, revealed that a common ontogenetic plan regarding the chronological sequence of morphogenetic events exists in mammalian orders as different as primates and odontocetes. Comparison of the 10‐mm and 11.5‐mm CRL harbour porpoise brains with those in other mammalian embryos of a similar ontogenetic stage (stages 16 and 17) showed a high degree of correspondence in morphological features. This ontogenetic age group therefore might still be considered as a generalized mammalian one. However, during succeeding morphogenesis of the Phocoena brain, qualititative and quantitative divergences from other mammalian groups became manifest, such as those found in the 24‐mm CRL specimen (corresponding to mammalian stages 20, 21). Early foetuses of the harbour porpoise (46 and 65 mm CRL) already exhibited a variety of typical odontocete brain features, such as absence of olfactory bulb, thick cochlear nerve, and strong progression of brainstem structures. Morphogenesis of the harbour porpoise brain is discussed from a comparative perspective, incorporating the literature on the development of mammalian brains. Part of this study has been published in abstract form (Buhl and Oelschläger: Acta Anat. (Basel) 120: 15–16 (Abstract), '84. |
format |
Article in Journal/Newspaper |
author |
Buhl, Eberhard H. Oelschläger, Helmut A. |
spellingShingle |
Buhl, Eberhard H. Oelschläger, Helmut A. Morphogenesis of the brain in the harbour porpoise |
author_facet |
Buhl, Eberhard H. Oelschläger, Helmut A. |
author_sort |
Buhl, Eberhard H. |
title |
Morphogenesis of the brain in the harbour porpoise |
title_short |
Morphogenesis of the brain in the harbour porpoise |
title_full |
Morphogenesis of the brain in the harbour porpoise |
title_fullStr |
Morphogenesis of the brain in the harbour porpoise |
title_full_unstemmed |
Morphogenesis of the brain in the harbour porpoise |
title_sort |
morphogenesis of the brain in the harbour porpoise |
publisher |
Wiley |
publishDate |
1988 |
url |
http://dx.doi.org/10.1002/cne.902770108 http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fcne.902770108 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fcne.902770108 https://onlinelibrary.wiley.com/doi/pdf/10.1002/cne.902770108 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
Journal of Comparative Neurology volume 277, issue 1, page 109-125 ISSN 0021-9967 1096-9861 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/cne.902770108 |
container_title |
Journal of Comparative Neurology |
container_volume |
277 |
container_issue |
1 |
container_start_page |
109 |
op_container_end_page |
125 |
_version_ |
1802645195975557120 |