活体鳄鱼的首次光子计数探测器计算机断层扫描:三维成像研究,特别是两栖听觉。

IF 4.6 2区 生物学 Q2 CELL BIOLOGY
Frontiers in Cell and Developmental Biology Pub Date : 2024-10-23 eCollection Date: 2024-01-01 DOI:10.3389/fcell.2024.1471983
Karl-Gunnar Melkersson, Hao Li, Helge Rask-Andersen
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引用次数: 0

摘要

背景介绍鳄鱼是一种半水生动物,非常适合在陆地和水下都能听到声音。目前,有关鳄鱼两栖听觉如何实现的信息非常有限。在这里,我们首次使用光子计数探测器计算机断层扫描(PCD-CT)和三维渲染技术描述了活体鳄鱼的耳部解剖结构。我们推测,尽管鳄鱼的耳道是封闭的,但它们是如何在水中利用鼓膜听力同时提供定向听力的:一条古巴鳄鱼(Crocodylus rhombifer)在麻醉和自主呼吸状态下接受了光子计数探测器计算机断层扫描(PCD-CT)。此外,两只七个月大的鳄鱼和一只幼年莫莱特鳄(Crocodylus moreletii)也接受了微型计算机断层扫描(µCT)和内窥镜检查。对一条成年库维耶尔斯侏儒凯门鳄(Paleosuchus palpebrosus)进行了显微解剖和录像。结果和讨论:带有三维渲染和分割功能的 PCD-CT 和 µCT 高分辨率地展示了活体鳄鱼和过期鳄鱼的外耳和中耳解剖结构。根据研究结果和对比检查,我们认为上耳瓣通过调节肉腔凹陷和局部骨传导,可以实现水下鳄鱼的鼓室听力,包括定向听力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
First photon-counting detector computed tomography in the living crocodile: a 3D-Imaging study with special reference to amphibious hearing.

Background: Crocodiles are semi-aquatic animals well adapted to hear both on land and under water. Currently, there is limited information on how their amphibious hearing is accomplished. Here, we describe, for the first time, the ear anatomy in the living crocodile using photon-counting detector computed tomography (PCD-CT) and 3D rendering. We speculate on how crocodiles, despite their closed ear canals, can use tympanic hearing in water that also provides directional hearing.

Material and methods: A Cuban crocodile (Crocodylus rhombifer) underwent photon-counting detector computed tomography (PCD-CT), under anesthesia and spontaneous respiration. In addition two seven-month-old C. rhombifer and a juvenile Morelet´s crocodile (Crocodylus moreletii) underwent micro-computed tomography (µCT) and endoscopy. One adult Cuviérs dwarf caiman (Paleosuchus palpebrosus) was micro-dissected and video-recorded. Aeration, earflap, and middle ear morphology were evaluated and compared after 3D modeling.

Results and discussion: PCD-CT and µCT with 3D rendering and segmentation demonstrated the anatomy of the external and middle ears with high resolution in both living and expired crocodiles. Based on the findings and comparative examinations, we suggest that the superior earflap, by modulating the meatal recess together with local bone conduction, may implement tympanic hearing in submerged crocodiles, including directional hearing.

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来源期刊
Frontiers in Cell and Developmental Biology
Frontiers in Cell and Developmental Biology Biochemistry, Genetics and Molecular Biology-Cell Biology
CiteScore
9.70
自引率
3.60%
发文量
2531
审稿时长
12 weeks
期刊介绍: Frontiers in Cell and Developmental Biology is a broad-scope, interdisciplinary open-access journal, focusing on the fundamental processes of life, led by Prof Amanda Fisher and supported by a geographically diverse, high-quality editorial board. The journal welcomes submissions on a wide spectrum of cell and developmental biology, covering intracellular and extracellular dynamics, with sections focusing on signaling, adhesion, migration, cell death and survival and membrane trafficking. Additionally, the journal offers sections dedicated to the cutting edge of fundamental and translational research in molecular medicine and stem cell biology. With a collaborative, rigorous and transparent peer-review, the journal produces the highest scientific quality in both fundamental and applied research, and advanced article level metrics measure the real-time impact and influence of each publication.
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