Broun G R, Govardovskiĭ V I
Neirofiziologiia. 1983;15(2):178-85.
Responses of the sensory epithelium of the electrically insulated Lorenzinian ampullae in the Black Sea skates (Raja clavata) as well as their spike frequency reactions to electrical stimulation were studied under the current-clamp conditions. The preparations have the input resistance of 200-800 k omega, the transepithelial resting potential of 0 divided by -2 mV and ordinary impulse activity in afferent fibres. Electroreceptor thresholds were of 2-10 microV (current approximately 10-11 A). With adequate parameters of stimulation (current up to 1 nA, voltage drop across the epithelium to +/-500 microV) the current-voltage relation of the epithelium was linear without any signs of both spike and oscillatory activity of the receptor cells. With negative currents more than 1-10 nA there appeared a regenerative spike in the epithelium. The spike was accompanied by abnormal impulse in an afferent fibre.
在钳制电流条件下，研究了黑海鳐（Raja clavata）中电绝缘的洛伦兹壶腹感觉上皮的反应及其对电刺激的放电频率反应。制备物的输入电阻为200 - 800 kΩ，跨上皮静息电位为0至 -2 mV，传入纤维具有正常的冲动活动。电感受器阈值为2 - 10 μV（电流约为10 - 11 A）。在适当的刺激参数下（电流高达1 nA，上皮上的电压降为+/-500 μV），上皮的电流 - 电压关系呈线性，没有受体细胞的放电和振荡活动迹象。当负电流超过1 - 10 nA时，上皮中出现再生性放电。该放电伴随着传入纤维中的异常冲动。
