Time-critical integration of formants for perception of communication calls in mice
Time-critical integration of formants for perception of communication calls in mice
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DOI：
10.1073/pnas.122606499
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发表时间：
2002-06-25
影响因子：
11.1
通讯作者：
Ehret, G
中科院分区：
文献类型：
--
作者：
Geissler, DB;Ehret, G
人类的大脑机制将频谱和时间域中的声频分量组合在一起，这导致对听觉对象和具有生物学和交流意义的声音事件流的感知。在知觉层面上，哺乳动物的行为数据，明确支持存在的共同概念，处理特定物种的通信声音是不可用的。在这里，我们合成了17个模型的小鼠幼崽蠕动的呼叫，提出了他们在一个自然的沟通情况下，四个呼叫的幼仔的母亲的序列，并记录了母亲的反应行为。我们发现，一个呼叫序列的生物学意义取决于分组在一起的三个主要的频率成分（共振峰）的声学对象在一个关键的时间窗口内约30毫秒的领先或滞后时间的第一共振峰。较长的提前或滞后时间显着降低母体的反应性。中枢抑制似乎负责设置这个时间窗口，这也是在人类的许多感知研究中发现的。此外，至少100 ms的同时存在的三个共振峰是必要的响应行为的发生。与人类一样，共振峰的起始时间间隔和共振峰持续时间非线性地相互作用，以影响对声音流的充分感知。总之，这些数据点的共同规则，时间关键的频谱整合，感知声学对象，听觉流（感知的声学完形）在小鼠和人类。
Brain mechanisms in humans group together acoustical frequency components both in the spectral and temporal domain, which leads to the perception of auditory objects and of streams of sound events that are of biological and communicative significance. At the perceptual level, behavioral data on mammals that clearly support the presence of common concepts for processing species-specific communication sounds are unavailable. Here, we synthesize 17 models of mouse pup wriggling calls, present them in sequences of four calls to the pups' mothers in a natural communication situation, and record the maternal response behavior. We show that the biological significance of a call sequence depends on grouping together three predominant frequency components (formants) to an acoustic object within a critical time window of about 30-ms lead or lag time of the first formant. Longer lead or lag times significantly reduce the maternal responsiveness. Central inhibition seems to be responsible for setting this time window, which is also found in numerous perceptual studies in humans. Further, a minimum of 100-ms simultaneous presence of the three formants is necessary for occurrence of response behavior. As in humans, onset-time asynchronies of formants and formant durations interact nonlinearly to influence the adequate perception of a stream of sounds. Together, these data point to common rules for time-critical spectral integration, perception of acoustical objects, and auditory streaming (perception of an acoustical Gestalt) in mice and humans.