权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Mechanisms and evolution of signal pattern recognition

信号模式识别的机制和演变

基本信息

批准号：
7075341
负责人：
HOWARD Carl GERHARDT
金额：
$ 22.51万
依托单位：
UNIVERSITY OF MISSOURI-COLUMBIA
依托单位国家：
美国
项目类别：
财政年份：
2002
资助国家：
美国
起止时间：
2002-07-01 至 2009-06-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/7075341
关键词：
Anura acoustic nerve animal communication behavior auditory discrimination auditory pathways evolution gender difference hearing language development nucleic acid quantitation /detection phonology psychoacoustics psychophysiology sensory mechanism sensory signal detection sound perception speech verbal learning

项目摘要

DESCRIPTION (provided by applicant): The overall goal of the proposed research is to gain knowledge about mechanisms and evolution of signal pattern recognition. The research exploits the advantages of acoustic communication in frogs as a model system for exploring: (1) combinations of physical properties of signals that convey biologically significant information; (2) the operating principles by which nervous systems processes and extract such information; and (3) patterns of evolutionary change in signal pattern recognition. Because frogs do not require acoustic experience to produce or to recognize signals, this system can yield knowledge bearing on analogous problems in the recognition and discrimination of speech sounds by infants. That is, all languages draw from a common set of phonetic segments, and infants with little linguistic experience can discriminate among phonetic segments that do not even occur in the language that they will ultimately learn. This research thus addresses questions about inborn mechanisms of pattern recognition that make possible the development of normal speech, which, in turn, is important for human mental health. The proposed research will use playbacks of computer-synthesized signals that simulate male communication sounds; females respond to these sounds with positive phonotaxis and discriminate subtle differences in one or more properties. The research addresses interactions of discrimination criteria based on the frequency content of the signal and differences in fine-scale temporal properties. These interactions will be quantified in two closely related species; these results will then be used to select tests to be conducted with seven other species that are more or less closely related. These data, in conjunction with an independently derived estimate of the phylogenetic relationships of all nine species, will be used to assess how pattern recognition might have evolved. Mechanistic and environmental factors that could explain evolutionary trends will also be identified. Ultimately, this research will be important for framing testable hypotheses about sensory mechanisms underlying pattern recognition and for guiding the execution of such studies.

描述(由申请人提供)：拟议研究的总体目标是获得关于信号模式识别的机制和演变的知识。这项研究利用青蛙的声音通信优势作为模型系统来探索：(1)传递生物重要信息的信号的物理特性的组合；(2)神经系统处理和提取此类信息的工作原理；以及(3)信号模式识别的进化变化模式。因为青蛙不需要声音经验来产生或识别信号，这个系统可以产生与婴儿识别和辨别语音的类似问题有关的知识。也就是说，所有语言都来自一组共同的语音片段，几乎没有语言经验的婴儿可以分辨出他们最终学习的语言中甚至没有出现的语音片段。因此，这项研究解决了关于模式识别的先天机制的问题，这些机制使正常语音的发展成为可能，而正常语音反过来对人类的心理健康非常重要。这项拟议的研究将使用模拟男性交流声音的计算机合成信号的回放；女性对这些声音的反应是积极的趋音性，并区分一个或多个属性中的细微差异。这项研究解决了基于信号的频率内容的区分标准与细微尺度时间特性的差异之间的相互作用。这些相互作用将在两个密切相关的物种中进行量化；然后这些结果将被用来选择与其他七个或多或少相近的物种进行的测试。这些数据与独立得出的对所有九个物种的系统发育关系的估计一起，将被用于评估模式识别可能是如何进化的。还将确定可能解释进化趋势的机制和环境因素。最终，这项研究将对构建关于模式识别潜在的感觉机制的可检验假说和指导此类研究的执行具有重要意义。

项目成果

期刊论文数量（12）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Parallel changes in mate-attracting calls and female preferences in autotriploid tree frogs.

同源三倍体树蛙的求偶叫声和雌性偏好的平行变化。

DOI：
10.1098/rspb.2011.1968
发表时间：
2012
期刊：
Proceedings. Biological sciences
影响因子：
0
作者：
Tucker,MitchA;Gerhardt,HC
通讯作者：
Gerhardt,HC

Mid-frequency suppression in the green treefrog (Hyla cinerea): mechanisms and implications for the evolution of acoustic communication.

绿色树蛙（Hyla cinerea）的中频抑制：声学通信进化的机制和影响。

DOI：
10.1007/s00359-005-0626-8
发表时间：
2005
期刊：
Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology
影响因子：
0
作者：
Gerhardt,HCarl;Höbel,Gerlinde
通讯作者：
Höbel,Gerlinde

Experimental analysis of multivariate female choice in gray treefrogs (Hyla versicolor): evidence for directional and stabilizing selection.