Nier K, Hensel H, Bromm B
Pflugers Arch. 1976 Jun 22;363(3):181-5. doi: 10.1007/BF00594599.
In a single-fibre preparations the afferent discharges from prepolarized ampullae of Lorenzini responding to graded temperature steps were investigated in the dogfish (Scyliorhinus canicula). The transformation characteristics of the ampullary receptors, especially their differential thermosensitivity interfering with electrosensitivity, were analyzed. Prepolarization significantly influenced the dynamic component of differential thermosensitivity, while the static component remained practically unchanged. Hyperpolarization reduced positive and negative dynamic thermal responses; depolarization amplified them. Biological consequences of this bimodal interference for receptor transformation of superimposed thermal and electric stimuli and for decoding afferent ampullary impulse patterns are discussed.
在单纤维制备实验中，研究了角鲨（Scyliorhinus canicula）中对分级温度阶跃作出反应的洛伦兹尼壶腹预极化传入放电。分析了壶腹受体的转换特性，特别是它们干扰电敏感性的差异热敏性。预极化显著影响差异热敏性的动态成分，而静态成分实际上保持不变。超极化降低了正向和负向动态热反应；去极化则增强了它们。讨论了这种双峰干扰对叠加热刺激和电刺激的受体转换以及传入壶腹冲动模式解码的生物学后果。
