Rapaport D H, Stone J
School of Anatomy, University of New South Wales, Kensington, Australia.
Exp Brain Res. 1988;70(1):73-8. doi: 10.1007/BF00271849.
We have studied the responses of ganglion cells of the cat retina to visual stimulation remote from the center of their receptive field. Following previous work, this response is termed the periphery effect (PE). Cells were identified as Y-, X- or W-class from the latency of their response to optic chiasm stimulation and from their receptive field properties. The strength of the PE elicited by a rotating windmill or counterphased grating stimulus was measured for ganglion cells of all major classes. The PE was consistently stronger in Y- than in X-cells, and the strength of the effect in both X- and Y-cells increased significantly with retinal eccentricity. A PE was elicited from about 47% of W-cells studied. In some (36%) the effect was excitatory, as for X- and Y-cells; in others (11%) it was inhibitory. Despite this heterogeneity, the PE in W-cells increased significantly with eccentricity. These variations of the PE with eccentricity and cell class have implications for the circuitry of the inner plexiform layer.
我们研究了猫视网膜神经节细胞对远离其感受野中心的视觉刺激的反应。根据之前的研究，这种反应被称为外周效应（PE）。根据神经节细胞对视交叉刺激的反应潜伏期及其感受野特性，将细胞分为Y类、X类或W类。测量了所有主要类型神经节细胞对旋转风车或反相光栅刺激诱发的外周效应的强度。Y类细胞的外周效应始终比X类细胞更强，并且X类和Y类细胞中外周效应的强度均随视网膜离心率显著增加。在所研究的W类细胞中，约47%可诱发外周效应。在一些细胞（36%）中，效应是兴奋性的，与X类和Y类细胞一样；在另一些细胞（11%）中，效应是抑制性的。尽管存在这种异质性，W类细胞的外周效应仍随离心率显著增加。外周效应随离心率和细胞类型的这些变化对内核层的神经回路具有重要意义。
