| retinal ganglion cell type I | Perry (Perry) | Type I cells have the largest cell bodies of all the classes (see table 1). The primary dendrites are generally smooth in appearance but sometimes have dendritic spines, and roughly halve their diameter at the first bifurcation (see plates 1, figures 1 and 2). The cells have 3 to 6 primary dendrites which enter the inner plexiform layer diagonally and appear to terminate in the outer part of inner plexiform layer. On many of these cells an axon could be identified and the axons were in general the thickest observed. | is included | | Since the vast majority of the ganglion cells sending axon collaterals bilaterally to the LGN or/and SC have been shown in the present study to be larger than 20 micrometers in diameter, they are considered to belong to the type I of retinal ganglion cells, which appear to contain the alpha cells and delta cells of Peichl. It has previously been described that the type I cells, which constitute 1-5% of all retinal ganglion cells, are distributed all over retina, with a slightly higher density in its lower-temporal region, where the bulk of retinal fibers directed ipsilateally toward the LGN and SC originate. In accordance with the distribution pattern of the ipislaterally projecting ganglion cells, including the multi-collateralized ones, have been demosntrated in the present study to be located almost exclusively in the lower-temporal retinal region. | Kondo Y., Takada M., Honda Y. & Mizuno N. | Mihail Bota |
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