INFLUENCE OF ACOUSTIC EXPERIENCE ON THE ONTOGENY OF FREQUENCY GENERALIZATION GRADIENTS IN THE CHICKEN
INFLUENCE OF ACOUSTIC EXPERIENCE ON THE ONTOGENY OF FREQUENCY GENERALIZATION GRADIENTS IN THE CHICKEN
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DOI：
10.1037/0097-7403.5.2.97
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发表时间：
1979-01-01
期刊：
影响因子：
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通讯作者：
RUBEL, EW
中科院分区：
文献类型：
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作者：
KERR, LM;OSTAPOFF, EM;RUBEL, EW
在雏鸡中研究了听觉经验在知觉编码个体发生中的作用[家鸡]。实验1采用惯化-概化范式和定向反应确定听觉频率概化梯度。1日龄和3-4日龄雏鸡先习惯800 Hz的音调，然后在800-1000 Hz的5个频率范围内进行测试。1天大的雏鸡比3-4天大的雏鸡表现出可靠的平坦的概化梯度。在实验2中，描述了一种将耳印化合物注入外耳的听觉剥夺方法。该方法经过完全校准，并在a上提供约40 dB的衰减。125-到4.0 khz的范围，似乎是完全可逆的，适用于正常的听觉体验之前和随后的阶段。在实验3中，我们使用这种方法来研究听觉剥夺对实验1中描述的感知锐化的影响。雏鸡在胚胎期第18 1/2天至产后3-4天进行剥夺，与试验1一样进行正常、剥夺和假手术雏鸡的试验。剥夺期雏鸡的概化梯度显著平坦于3 ~ 4日龄正常和假手术雏鸡，与1日龄雏鸡相似。这种影响不能归因于手术程序、听觉阈值的改变或反应率随年龄或病情的变化。在没有正常声学环境的情况下，通常发生在产后1至3-4天之间的感知锐化无法在这段时间内发生。
The role of auditory experience in the ontogeny of perceptual coding was investigated in hatchling chickens [Gallus domesticus]. In experiment 1, auditory frequency generalization gradients were determined by using a habituation-generalization paradigm and an orienting response. One-day and 3-4-day chicks were habituated to 800-Hz tones and then tested at 5 frequencies ranging from 800-1000 Hz. One-day chicks displayed reliably flatter generalization gradients than 3-4-day chicks. In experiment 2, an auditory deprivation method is described in which an ear impression compound was injected into the external ear. This method is fully calibrated and provides approximately 40 dB of attenuation across a .125- to 4.0-kHz range, appeared to be fully reversible, and was applicable prior to normal auditory experience and at subsequent stages. In experiment 3, this method was used to investigate the effects of auditory deprivation on the perceptual sharpening described in experiment 1. Chicks were deprived from embryonic day 18 1/2 to 3-4 days posthatch, at which time normal, deprived and sham-operated chicks were tested as in experiment 1. The generalization gradients of the deprived chicks were significantly flatter than those of the 3-4 day normal and sham-operated chicks and were similar to those of 1-day chicks. This effect cannot be attributed to operative procedures, changes in auditory thresholds, or changes in response rate with age or condition. The perceptual sharpening normally occurring between 1 and 3-4 days posthatch fails to occur during that time in the absence of a normal acoustic environment.