Sensory cues for sound localization in the cricket Teleogryllus oceanicus: interaural difference in response strength versus interaural latency difference
Sensory cues for sound localization in the cricket Teleogryllus oceanicus: interaural difference in response strength versus interaural latency difference
复制标题
蟋蟀Teleogryllus oceanicus声音定位的感觉线索：耳间响应强度差异与耳间潜伏期差异
DOI：
--
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
G. Pollack
中科院分区：
文献类型：
--
作者：
G. Pollack
听觉感受器神经元的反应强度（放电率和/或峰电位计数）和反应潜伏期的耳间差异是声音定位的两个潜在感觉线索。先前的实验表明，这两种线索受到强烈的先前刺激的不同影响;反应强度的差异下降，甚至可能在符号上逆转，但潜伏期的差异不受影响。在这里，我使用一个强烈的，恒定的音调来破坏由随后的声音脉冲序列产生的定位线索。听神经的记录证实，音调刺激减少，有时逆转，耳间的差异，在随后的声音脉冲的反应强度，但它增强了耳间的潜伏期差异。如果声音定位主要通过潜伏期比较来确定，那么对音调刺激后的脉冲串的行为反应应该是正常的，但是如果声音定位的主要线索是反应强度的耳间差异，那么音调后的行为反应有时应该是错误的。最初的phonotactic反应后音脉冲序列经常被引导远离，而不是朝向，声源，这表明声音位置的主要感官线索是耳间差异的反应强度。
Two potential sensory cues for sound location are interaural difference in response strength (firing rate and/or spike count) and in response latency of auditory receptor neurons. Previous experiments showed that these two cues are affected differently by intense prior stimulation; the difference in response strength declines and may even reverse in sign, but the difference in latency is unaffected. Here, I use an intense, constant tone to disrupt localization cues generated by a subsequent train of sound pulses. Recordings from the auditory nerve confirm that tone stimulation reduces, and sometimes reverses, the interaural difference in response strength to subsequent sound pulses, but that it enhances the interaural latency difference. If sound location is determined mainly from latency comparison, then behavioral responses to a pulse train following tone stimulation should be normal, but if the main cue for sound location is interaural difference in response strength, then post-tone behavioral responses should sometimes be misdirected. Initial phonotactic responses to the post-tone pulse train were frequently directed away from, rather than towards, the sound source, indicating that the dominant sensory cue for sound location is interaural difference in response strength.