ELECTRICAL INHIBITION IN THE RETINA OF THE BUTTERFLY PAPILIO .1. 4 SPECTRAL TYPES OF PHOTORECEPTORS
ELECTRICAL INHIBITION IN THE RETINA OF THE BUTTERFLY PAPILIO .1. 4 SPECTRAL TYPES OF PHOTORECEPTORS
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DOI：
10.1007/bf00611182
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发表时间：
1983-01-01
期刊：
影响因子：
--
通讯作者：
MATIC, T
中科院分区：
文献类型：
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作者：
MATIC, T
四种光谱类型的光感受器的特征在于双电极记录，其中一个电极在细胞内，另一个电极在细胞外。颜色类型为：390 nm处的UV峰值灵敏度;蓝色450 nm;绿色540 nm;和红色610 nm。超极化后电位（HAP）被消除时，一个单位的刺激在峰值波长，并大大减少在非峰值刺激，这意味着至少部分被动侧电抑制。从点源刺激到扩散扩展源的变化增加了细胞外和细胞内超极化（在非峰值波长处），并降低了细胞内去极化;跨膜电位不改变。绿峰细胞中第二峰（UV）的存在及其响应于各种刺激的变化由具有β-的视紫红质解释。峰和光感受器之间的相互作用。差分记录带来了大部分的光谱灵敏度的曲线预测的达特纳尔诺模图。提出了一种电侧抑制模型。
Four spectral types of photoreceptors were characterized by double electrode recordings, with 1 electrode inside the cell and the other immediately outside. The color types are: UV peak sensitivity at 390 nm; blue 450 nm; green 540 nm; and red 610 nm. The hyperpolarizing afterpotential (HAP) is eliminated when a unit is stimulated at peak wavelength, and greatly reduced during off-peak stimulation, implying at least partial passive lateral electrical inhibition. The change from a point source stimulus to a diffuse extended source increases both the extracellular and the intracellular hyperpolarizations (at off-peak wavelengths), and reduces the intracellular depolarization; the transmembrane potential does not change. The existence of the secondary peak (UV) in green-peak cells and its changes in response to various stimuli are explained by a rhodopsin with a .beta.-peak and by interactions between the photoreceptors. Differential recording brings most of the spectral sensitivities to the curves predicted by the Dartnall nomograms. A model of electrical lateral inhibition is presented.