蜚蠊尾须单个细毛型感受器对机械刺激的反应  

RESPONSES OF THE SINGLE THREAD HAIR SENSILLUM OF THE CERCUS OF THE COCKROACH PERIPLANETA AMERICANA TO MECHANICAL STIMULI

作　　者：周培爱[1] 张克巨[1] 程会文[1] 

机构地区：[1]北京大学生物学系

出　　处：《生物物理学报》1991年第1期54-58,共5页Acta Biophysica Sinica

摘　　要：用钨丝微电极插入蜚蠊尾须细毛感受器的园盘作胞外记录.研究了感受器自发脉冲的统计特性.利用电磁驱动装置控制毛杆的偏转,研究了感受器电位和脉冲对正弦波、方波和阶梯波机械刺激的反应特性,并测定了六列细毛的兴奋方向.Receptor potential and neuronal impulses were recorded extracellulary on 147 sensilla of 43 animals fom the socket disk of the hair sensillum viith a tungsten microelectrode. The deflection of the hairshaft (within the preference plane)was controlled with the aid of an electromagnetic pusher driven by sinusoidal, square wave or double-step wave input currents.Without mechanical stimulus, the inter-spike interval histogram of the spontaneous impulses had an exponential distribution except at the range of small interval. When the hair was deflected in the excitatory or inhibitory directions) a depolarizing or a hyperpolarizing receptor potential was shown, and correspondingly the impulse frepuence was increased or decreased. The receptor potentials were phasic-tonic with slow adaptation and the amplitudes were determined within a certain degree, by the deflection angle of the hairshaft. The impulses, however, were phasic depending on the direction in which the hairshaft was moving. The exctiatory directions for the 6 columns of the hair sensilla, namely, d, g, h, i, k, l, were also determined.

关 键 词：蜚蠊 尾须 细毛型感受器 机械刺激 

分 类 号：Q949.250.7[生物学—植物学]