April 1991
Volume 32, Issue 5
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Articles  |   April 1991
Selective effects of experimental glaucoma on axonal transport by retinal ganglion cells to the dorsal lateral geniculate nucleus.
Author Affiliations
  • L Dandona
    Glaucoma Service, Johns Hopkins University School of Medicine, Baltimore, Maryland.
  • A Hendrickson
    Glaucoma Service, Johns Hopkins University School of Medicine, Baltimore, Maryland.
  • H A Quigley
    Glaucoma Service, Johns Hopkins University School of Medicine, Baltimore, Maryland.
Investigative Ophthalmology & Visual Science April 1991, Vol.32, 1593-1599. doi:
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      L Dandona, A Hendrickson, H A Quigley; Selective effects of experimental glaucoma on axonal transport by retinal ganglion cells to the dorsal lateral geniculate nucleus.. Invest. Ophthalmol. Vis. Sci. 1991;32(5):1593-1599.

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Abstract

Rapid-phase axonal transport to the dorsal lateral geniculate nucleus (dLGN) was determined autoradiographically in seven macaque monkey eyes with chronic intraocular pressure (IOP) elevation, in four eyes with an acute IOP elevation, and in three eyes with normal IOP. The monkeys with chronic IOP elevation showed a greater decrease in radioactive labeling of the magnocellular layers of the dLGN than the parvocellular layers by qualitative examination. Grain counts in selected specimens confirmed that transport to the magnocellular layers was less than to the parvocellular layers in monkeys with chronic IOP elevation. This selectivity was present in mildly damaged specimens and increased with greater ganglion cell loss. In monkeys with acute IOP elevation, qualitative evaluation suggested no consistent difference in transport among the dLGN layers; one animal in this group had less transport to the parvocellular than to the magnocellular layers by grain counts. Starting in early stages of the disease, chronic experimental glaucoma causes preferential damage to the ganglion cells that project to the magnocellular layers of the dLGN.

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