LEFT-HEMISPHERE ADVANTAGE IN THE MOUSE-BRAIN FOR RECOGNIZING ULTRASONIC COMMUNICATION CALLS
LEFT-HEMISPHERE ADVANTAGE IN THE MOUSE-BRAIN FOR RECOGNIZING ULTRASONIC COMMUNICATION CALLS
复制标题
DOI：
10.1038/325249a0
复制
发表时间：
1987-01-15
期刊：
影响因子：
64.8
通讯作者：
EHRET, G
中科院分区：
文献类型：
--
作者：
EHRET, G
在人类中，被感知为语音的声音优先由右耳和大脑的左半球处理1 -3。在动物中，这种优势的一个半球（侧化）在处理通信声音从其他成员的物种迄今已被证明只有在猕猴4 -6。我在这里报告说，家鼠的前脑比人或猕猴的前脑要小得多，幼鼠发出的唤起母性关怀行为的超声波叫声优先由左半球识别。在没有幼犬经验的雌性动物中，通过条件反射训练它们对相同的超声波呼叫做出反应，没有检测到一个半球的优势。研究结果表明，这种功能的偏侧化在哺乳动物中很早就进化出来了，并强调了感知交流声音的先天倾向与左半球在处理这些声音方面的优势有关。该实验系统是一种易于获得的研究偏侧听觉脑功能的动物模型。
In humans, sound perceived as speech is processed preferentially by the right ear and the left hemisphere of the brain1–3. Among animals, such an advantage of one hemisphere (lateralization) in processing communication sound from other members of the species has so far been demonstrated only in macaque monkeys4–6. I report here that in the house mouse, which has a very much less elaborate forebrain than man or macaque monkey, the ultrasonic calls that are emitted by young mice to evoke maternal caring behaviour are preferentially recognized by the left hemisphere. In females with no experience of pups, which have been trained to respond to the same ultrasonic calls by conditioning, no advantage for one hemisphere is detected. The results suggest that lateralization of this function evolved early in mammals and emphasize that an innate predisposition for perceiving communication sounds is connected with a left-hemisphere advantage in processing them. This experimental system is a readily-available animal model for studying lateralized auditory brain functions.