[蜗牛平衡囊毛细胞的自发活动及其因细胞内刺激而发生的变化]
[Spontaneous activity of the hair cells of the snail statocyst and changes in it as a result of intracellular stimulation].
作者信息
Ovchinnikov A V
出版信息
Neirofiziologiia. 1985;17(2):222-9.
The activity of hair cells in the stotocyst of Helix lucorum was studied by means of intracellular recording. Maximal magnitude of input resistance of hair cell membranes was observed in the range of the injected hyperpolarizing current between 0 and 0.1 nA. Voltage noise was a specific type of hair cell activity. It was independent of synaptic activity and had no pacemaker nature. The voltage noise depended only on the contact between hair cell cilia and statoconia. Hair cell depolarization enabled to reveal the pacemaker properties of the receptor membrane. Spike-triggering zone was found to be located in the axon of hair cell. IPSP recorded in the hair cells of the preparations with the static nerve cut confirmed the existence of inhibitory interactions within the statocyst.
采用细胞内记录法研究了中华圆田螺平衡囊毛细胞的活动。在注入0至0.1纳安的超极化电流范围内，观察到毛细胞膜输入电阻的最大幅值。电压噪声是毛细胞活动的一种特殊类型。它与突触活动无关，不具有起搏器特性。电压噪声仅取决于毛细胞纤毛与耳石之间的接触。毛细胞去极化能够揭示感受器膜的起搏器特性。发现触发峰电位的区域位于毛细胞的轴突中。在切断静态神经的标本的毛细胞中记录到的抑制性突触后电位证实了平衡囊内存在抑制性相互作用。
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