| Cell type (class) | Nomenclature (Acronym) |
Definition | Relation of retinal ganglion cell type II |
| Annotation | Reference |
Collator |
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| retinal ganglion cell Class IIa | Dreher (Dreher) | RGC2 gave a morphology similar to the delta ganglion cells of Peichl (1989). They have a small to medium-sized somata from which fine axons emerge. Two to four primary dendrites branch close to the soma. These and subsequent branches twist and turn, unlike the radiating dendrites of the Group RGA neurons. The soma is usually central to the dendritic field. The dendritic fileds are smalled than those Group RGA cells at the same eccentricities, and they show little variation in size as a function of eccentricity (Fig. 12). RGC2 neurons did not exhibit tracer coupling, but many have numerous and prominent dendritic spines. RGC2 neurons stratify in the outer...laminae of the IPL. Their stratification range, however, is relatively broad, averaging 33% of the IPL (Table 1). | synonym | | ....Class IIa cells have a very similar morphology to Type II cells identified both in Golgi-stained wholemounted retinae [Perry, 1979] and in retinal wholemounts from rats in which HRP has been injectede into the thalamus and midbrain [Perry, 1981]. | Dreher B., Sefton A.J., Ni S.Y.K, Nisbett G. | Mihail Bota |
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| retinal ganglion cell "tight" type | Brown-morphological (B-morpho) | In Fig. 3, cells A, C, E, and G are of the “tight” type, while B, D, and F are of the “loose” type. The average size of dendritic field (Table 1) is 397 micrometers for loose-type cells and 282 micrometers for tight-type cells. | partial correspondence | | Type II cells are similar in form to those described by Brown (1965) as 'tight'. He described the dendritic fields of 'tight' cells as being smaller than the loose cells and having dendrites passing into the outer part of the inner plexiform layer. Collator note: see also Huxlin and Goodchild, 1997. | Perry V.H. | Mihail Bota |
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| retinal ganglion cell B2 | Huxlin and Goodchild (HG) | Fourteen neurons were defined as RGB2 cells (Figs. 2D, 8B). These cells are easy to distinguish by the very dense nature of their small dendritic trees. This high density is due to frequent, irregular branching of fine dendrites, which curve, twist, and overlap extensively (Fig. 2D). Their cell body is generaly located well within the confines of the dendritic tree. RGB2 cells were found across the retina (Fig. 9). | includes | | RGB2 and RGB3 cells strongly resemble the cells described by Perry (1979) as Type II. | Huxlin K.R & Goodchild A.K. | Mihail Bota |
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| retinal ganglion cell B3 | Huxlin and Goodchild (HG) | Twenty-four cells were defined as RGB3 cells (Fig. 8C). The shape and branching patterns of their dendritic trees resemble those of RGA2 cells, although dendritic fields are much smaller. The somata are centrally located within the dendritic field. RGB3 cells show a greater range in dendritic field sizes than other RGB subgroups (Fig. 9), which suggests further heteronegeitiy. | includes | | RGB2 and RGB3 cells strongly resemble the cells described by Perry (1979) as Type II. | Huxlin K.R & Goodchild A.K. | Mihail Bota |
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| retinal ganglion cell B3 inner | Sun (Sun) | Two populations of RGB3 cells were identified, stratifying in the inner IPL and outer IPL, respectively. | includes | | Dreher and colleagues (1985) identified two types of small-field ganglion cells. It is difficult to determine, as a result of incomplete filling, which of their classes resemble ours. The authors described their Class IIa as ‘‘bushy,’’ which may correlate with our RGB2 cells. | Huxlin K.R & Goodchild A.K. | Mihail Bota | | We confirmed the three groups of RGB ganglion cells identified by Huxlin and Goodchild (1997) with a larger sample size. | Sun W., Li N. & He S. | Mihail Bota | |
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