Morphology of retinal ganglion cells in lungless salamanders (fam. Plethodontidae): an HRP and Golgi study.

The Journal of Comparative Neurology
R Linke, G Roth

Abstract

The family Plethodontidae consists of nearly two-thirds of all living urodeles; most of them possess highly developed visual abilities. We investigated the morphology of retinal ganglion cells (RGCs) in four representative species by means of the horseradish peroxidase method in flatmounts and in transverse sections and with the Golgi method in transverse sections. In flatmount preparations, four classes of RGCs were found, differing in dendritic arborization, dendritic field size, and stratification pattern of dendrites in the inner plexiform layer (IPL). Class-1 cells had small dendritic fields (29-44 microns 2) and arborized throughout the entire depth of the IPL. Class-2 cells had medium to large dendritic fields (75-206 microns 2) and mostly arborized in two or three laminae or in a diffuse fashion in the IPL. Class-3 cells had medium to large dendritic fields (72-200 microns 2) but sparse dendritic arborization. They only arborized in the proximal lamina of the IPL. Class-4 cells had large dendritic fields (273-626 microns 2) and branched in the most sclerad stratum of the IPL. No large differences in intraspecific soma size of the different RGC classes were detected (although interspecific soma size varied to a considera...Continue Reading

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Citations

Jan 1, 1990·The Journal of Comparative Neurology·G RothW Grunwald
Oct 13, 2001·The Journal of Experimental Zoology·G Schlosser
Aug 13, 2009·The Journal of Comparative Neurology·Igor I Pushchin, Yuriy A Karetin
Feb 20, 1995·The Journal of Comparative Neurology·C B TorisR F Miller

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