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Distinct patterns of distribution among nadph diaphorase neurons of the guinea pig retina

Distinct patterns of distribution among nadph diaphorase neurons of the guinea pig retina

Neuroscience Letters 103(1): 1-7

We have examined the morphology and distribution of nicotinamide adenine dinucleotide phosphate diaphorase (NADPH-diaphorase) cells in the retina of the guinea pig. Two morphologically distinct classes of labelled cells were detected, one with larger, darkly labelled somata commonly located in the inner nuclear layer (INL; NDa cells) and the other with smaller, lightly labelled somata in the ganglion cell layer (GCL; NDb cells). The somata of NDb cells did not vary in diameter with eccentricity, whereas those of the NDa cells were smallest in the visual streak. The number of NDa cells was approximately 3500, with a mean density of 26/mm2 and NDb cells numbered approximately 4400, with a mean density of 33/mm2. NDa cells were distributed relatively uniformly across the retina, whereas NDb cells concentrated in the visual streak and were restricted to the superior half of the retina. In these features of morphology and distribution, NADPH-diaphorase neurones of the guinea pig retina are distinct from those observed in other species. It remains to be elucidated whether the diversity in the morphology and distribution of NADPH-diaphorase neurones between species reflect a diversity in their function.

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Accession: 007218868

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PMID: 2779850

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