Behavioral evidence of a latency code for stimulus intensity in mormyrid electric fish
Behavioral evidence of a latency code for stimulus intensity in mormyrid electric fish
复制标题
斑尾电鱼刺激强度潜伏期代码的行为证据
DOI：
10.1007/bf00243396
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
R. Zelick
中科院分区：
文献类型：
--
作者：
C. Hall;C. Bell;R. Zelick
Mormryid 电鱼 (Gnathonemus petersii) 对新刺激的反应是电器官放电 (EOD) 速率增加。这些新奇的反应被用来测量鱼检测电刺激的幅度和潜伏期的微小变化的能力。在箭毒鱼中诱发了反应，其中 EOD 被阻止，但 EOD 运动命令继续发出。在 EOD 运动命令后，在 2.4 至 14.4 毫秒的潜伏期向鱼提供人工 EOD。人工 EOD 幅度小至基线幅度 1% 的瞬时变化和潜伏期小至 0.1 毫秒都会引起新奇的反应。潜伏期的变化仅在小于 12.4 毫秒的基线延迟时有效。对潜伏期微小变化的敏感性支持这样的假设：潜伏期被用作斑鸠鱼主动电定位系统中刺激强度的代码。结果还表明，与 EOD 电机命令相关的推论放电信号用于测量延迟。
Mormryid electric fish (Gnathonemus petersii) respond to novel stimuli with an increase in the rate of the electric organ discharge (EOD). These novelty responses were used to measure the fish's ability to detect small changes in the amplitude and latency of an electrosensory stimulus. Responses were evoked in curarized fish in which the EOD was blocked but in which the EOD motor command continued to be emitted. An artificial EOD was provided to the fish at latencies of 2.4 to 14.4 ms following the EOD motor command.Novelty responses were evoked in response to transient changes in artificial EOD amplitude as small as 1% of baseline amplitude, and in latency as small as 0.1 ms. Changes in latency were effective only at baseline delays of less than 12.4 ms.The sensitivity to small changes in latency supports the hypothesis that latency is used as a code for stimulus intensity in the active electrolocation system of mormyrid fish. The results also indicate that a corollary discharge signal associated with the EOD motor command is used to measure latency.