The natural history of sound localization in mammals--a story of neuronal inhibition.

The natural history of sound localization in mammals--a story of neuronal inhibition.
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DOI:
10.3389/fncir.2014.00116
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发表时间:
2014
影响因子:
3.5
通讯作者:
Pecka M
Pecka M
中科院分区:
医学3区
文献类型:
--
作者:
Grothe B;Pecka M

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我们关于脊椎动物大脑中声音定位的概念广泛地基于这样一个一般假设,即检测空气传播声音的能力和神经元处理在主龙(今天的鳄鱼和鸟类)和哺乳动物中是同源的。然而,研究一再报告相互矛盾的结果,神经元电路和机制,特别是抑制的作用,以及鸟类和哺乳动物模型系统之间的编码策略。在这里,我们认为,哺乳动物和鸟类的空间听觉的同源性的特点是由一个收敛的演变听到空气传播的声音,而不是同源性。特别是,早期哺乳动物和祖龙的鼓室耳的不同进化起源和双耳线索的不同可用性对各自的双耳处理机制施加了不同的限制。突触抑制在哺乳动物中产生双耳空间灵敏度的作用是突出的,因为它揭示了一个统一的原则,哺乳动物电路设计编码的声音位置。总之,我们联合收割机进化,解剖学和生理学的论点,使哺乳动物的加工机制和编码策略和祖龙之间的明确区分。我们强调,神经元机制的收敛性的考虑将显着增加在哺乳动物和鸟类的空间处理的研究的解释力。
Our concepts of sound localization in the vertebrate brain are widely based on the general assumption that both the ability to detect air-borne sounds and the neuronal processing are homologous in archosaurs (present day crocodiles and birds) and mammals. Yet studies repeatedly report conflicting results on the neuronal circuits and mechanisms, in particular the role of inhibition, as well as the coding strategies between avian and mammalian model systems. Here we argue that mammalian and avian phylogeny of spatial hearing is characterized by a convergent evolution of hearing air-borne sounds rather than by homology. In particular, the different evolutionary origins of tympanic ears and the different availability of binaural cues in early mammals and archosaurs imposed distinct constraints on the respective binaural processing mechanisms. The role of synaptic inhibition in generating binaural spatial sensitivity in mammals is highlighted, as it reveals a unifying principle of mammalian circuit design for encoding sound position. Together, we combine evolutionary, anatomical and physiological arguments for making a clear distinction between mammalian processing mechanisms and coding strategies and those of archosaurs. We emphasize that a consideration of the convergent nature of neuronal mechanisms will significantly increase the explanatory power of studies of spatial processing in both mammals and birds.
DOI: 10.1007/0-387-28863-5_5
发表时间: 2005-01-01
期刊: SOUND SOURCE LOCALIZATION
影响因子: --
作者:
Brown, CH;May, BJ
通讯作者: May, BJ
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期刊: HEARING RESEARCH
影响因子: 2.8
作者:
Christensen-Dalsgaard, Jakob
通讯作者: Christensen-Dalsgaard, Jakob
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发表时间: 2005-01-03
影响因子: 2.5
作者:
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发表时间: 1975-01-01
影响因子: 1.5
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