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Open Access 25-04-2024 | Magnetic Resonance Imaging | Original Article

Anatomical and volumetric description of the guiana dolphin (Sotalia guianensis) brain from an ultra-high-field magnetic resonance imaging

Authors: Kamilla Avelino-de-Souza, Heitor Mynssen, Khallil Chaim, Ashley N. Parks, Joana M. P. Ikeda, Haydée Andrade Cunha, Bruno Mota, Nina Patzke

Published in: Brain Structure and Function

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Abstract

The Guiana dolphin (Sotalia guianensis) is a common species along Central and South American coastal waters. Although much effort has been made to understand its behavioral ecology and evolution, very little is known about its brain. The use of ultra-high field MRI in anatomical descriptions of cetacean brains is a very promising approach that is still uncommon. In this study, we present for the first time a full anatomical description of the Guiana dolphin’s brain based on high-resolution ultra-high-field magnetic resonance imaging, providing an exceptional level of brain anatomical details, and enriching our understanding of the species. Brain structures were labeled and volumetric measurements were delineated for many distinguishable structures, including the gray matter and white matter of the cerebral cortex, amygdala, hippocampus, superior and inferior colliculi, thalamus, corpus callosum, ventricles, brainstem and cerebellum. Additionally, we provide the surface anatomy of the Guiana dolphin brain, including the labeling of main sulci and gyri as well as the calculation of its gyrification index. These neuroanatomical data, absent from the literature to date, will help disentangle the history behind cetacean brain evolution and consequently, mammalian evolution, representing a significant new source for future comparative studies.
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Metadata
Title
Anatomical and volumetric description of the guiana dolphin (Sotalia guianensis) brain from an ultra-high-field magnetic resonance imaging
Authors
Kamilla Avelino-de-Souza
Heitor Mynssen
Khallil Chaim
Ashley N. Parks
Joana M. P. Ikeda
Haydée Andrade Cunha
Bruno Mota
Nina Patzke
Publication date
25-04-2024
Publisher
Springer Berlin Heidelberg
Published in
Brain Structure and Function
Print ISSN: 1863-2653
Electronic ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-024-02789-1
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