Grim J N
Department of Biological Sciences, Northern Arizona University, Flagstaff.
Acta Anat (Basel). 1990;138(3):261-4. doi: 10.1159/000146949.
The retina of the common mole, Scalopus aquaticus, has been studied with the transmission electron microscope. Structures examined include: pigment epithelium, outer and inner segments of the sensory cells, and synaptic ribbons of the outer plexiform layer. Rods and cones described in species by previous light microscopic studies are not seen with electron microscopic techniques. Instead, the mole retina contains peculiar outer segments consisting of whorls of membranes. These whorls have some similarities to dystrophic retinas of several vertebrates. The possibility of their being caused by extraordinary light exposure is discussed, also. The appearance of the sensory cells suggests that they are functional receptors.
对北美水鼹（Scalopus aquaticus）的视网膜进行了透射电子显微镜研究。所检查的结构包括：色素上皮、感觉细胞的外段和内段，以及外网状层的突触带。以往光学显微镜研究中描述的该物种的视杆细胞和视锥细胞，在电子显微镜技术下未被观察到。相反，鼹鼠视网膜含有由膜盘绕而成的特殊外段。这些盘绕与几种脊椎动物的营养不良性视网膜有一些相似之处。还讨论了它们是否由异常光照引起的可能性。感觉细胞的外观表明它们是功能性感受器。
