Correlations Between Auditory Structures and Hearing Sensitivity in Non-Human Primates
Correlations Between Auditory Structures and Hearing Sensitivity in Non-Human Primates
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DOI：
10.1002/jmor.10814
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发表时间：
2010-05-01
影响因子：
1.5
通讯作者：
Colbert, Matthew W.
中科院分区：
文献类型：
--
作者：
Coleman, Mark N.;Colbert, Matthew W.
灵长类在听力敏感度和听觉形态上表现出不同，通常遵循系统发育模式。然而，以前很少有研究试图研究灵长类听力的差异如何与耳朵形态的差异直接相关。这项研究通过探索非人类灵长类动物系统发育的广泛样本中听觉系统的形式与功能的关系，帮助填补了这一空白。外耳、中耳和内耳的许多结构被测量在具有已知听力能力的分类群中。所研究的结构包括耳廓的整体大小和形状、鼓膜和腓骨板的面积、听小骨的质量和杠杆臂长度、中耳腔的体积和耳蜗长。结果表明，各种听觉结构与听力的某些方面(特别是低频敏感度)显示出显著的相关性。虽然这些关系中的大多数都符合听觉理论的预期，但一些传统的(可能是过时的)想法并不被支持。例如，普遍的误解是，较高的中耳变压器比率(例如，阻抗变压器比率)会导致听力敏感度增加，这一误解不被支持。虽然形式和功能之间的简单关系并不一定意味着因果关系，但本研究中定义的关系不仅增加了我们对现有类群中听觉模式的理解，也为开始研究灵长类化石的听力奠定了基础。J.Morphol。2010年，271：511-532。(C)2009年Wiley-Liss，Inc.
Primates show distinctions in hearing sensitivity and auditory morphology that generally follow phylogenetic patterns. However, few previous studies have attempted to investigate how differences in primate hearing are directly related to differences in ear morphology This research helps fill this void by exploring the form-to-function relationships of the auditory system in a phylogenetically broad sample of non-human primates. Numerous structures from the outer, middle, and inner ears were measured in taxa with known hearing capabilities. The structures investigated include the overall size and shape of the pinna, the areas of the tympanic membrane and stapedial footplate, the masses and lever arm lengths of the ossicles, the volumes of the middle ear cavities, and the length of the cochlea. The results demonstrate that a variety of auditory structures show significant correlations with certain aspects of hearing (particularly low-frequency sensitivity). Although the majority of these relationships agree with expectations from auditory theory, some traditional (and possibly outdated) ideas were not supported. For example, the common misconception that higher middle ear transformer ratios (e.g., impedance transformer ratio) result in increased hearing sensitivity was not supported. Although simple correlations between form and function do not necessarily imply causality, the relationships defined in this study not only increase our understanding of auditory patterns in extant taxa but also lay the foundation to begin investigating the hearing in fossil primates. J. Morphol. 271:511-532, 2010. (C) 2009 Wiley-Liss, Inc.