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弱电鱼裸臀鱼的皮肤电振荡

Cutaneous electrical oscillation in a weakly electric fish, Gymnarchus niloticus.

作者信息

Kawasaki M

机构信息

Department of Biology, University of Virginia, Charlottesville 22903, USA.

出版信息

J Comp Physiol A. 2001 Oct;187(8):597-604. doi: 10.1007/s003590100232.

Abstract

An African electric fish, Gymnarchus niloticus. ceases its electric organ discharge for a prolonged time in response to external electrical signals. During the cessation of electric organ discharges from the electric organ, a weak sinusoidal signal (approximately 0.1 mV cm(-1)) near the fish's previous discharge frequency was recorded near the body. The oscillatory potentials at all points on the body surface were synchronized and had a complex spatial distribution. The source of the potential was determined to be within the dermal tissue. Electroreceptive central neurons that responded to a moving target near the fish with normal electric organ discharges also responded to the same target when the electric organ discharge was interrupted and the potential from the skin existed. This result suggests that the fish may be able to electrolocate objects without the discharge from the electric organ.

摘要

一种非洲电鱼,裸臀鱼,会因外部电信号而长时间停止其电器官放电。在电器官停止放电期间,在鱼体附近记录到一个频率接近鱼先前放电频率的微弱正弦信号(约0.1 mV cm(-1))。体表所有点的振荡电位是同步的,并且具有复杂的空间分布。电位的来源被确定在真皮组织内。当正常电器官放电时对鱼附近移动目标有反应的电感受中枢神经元,在电器官放电中断且皮肤存在电位时,对同一目标也有反应。这一结果表明,这种鱼可能能够在电器官不放电的情况下进行电定位。

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