Glenn Niemeyer

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We and others have reported that neural stem/progenitor cells (NSCs) may exert direct anti-inflammatory activity. This action has been attributed, in part, to T-cell suppression. However, how T-cells become suppressed by NSCs remains unresolved. In this study, we explored one of these mechanisms and challenged some previously advanced hypotheses regarding(More)
The distribution of astrocytes in the vascularized retina of pigs, rats and cats was investigated by confocal microscopy and computer-assisted image processing. In whole mounts, immunocytochemical identification was done by staining astrocytes for glial fibrillary acidic protein (GFAP), and blood vessels for alpha-smooth muscle actin or collagen IV.(More)
  • G Niemeyer
  • 1977
The viability of an arterially perfused mammalian eye preparation is demonstrated in (1) electrophysiological recordings of multineuronal responses (electroretinogram, optic nerve action potential) as well as of signals from single cells (ganglion cells, horizontal cells, pigment epithelium), and (2) in a quantitative analysis of the fine structure of the(More)
  • G Niemeyer
  • 1989
The phenomena of light-evoked electrical activity of the retinal pigment epithelium, retina, and visual cortex can be used for specific diagnostic testing. The EOG, with standing potential and light peak, reflects the functional state of the pigment epithelium; the ERG reflects the function of the photoreceptors (a-wave) and inner nuclear layer (b-wave),(More)
  • G Niemeyer
  • 1979
Clinical evaluation of the function of the human retina by subjective, psychophysical tests can be complemented by objective, electrophysiological methods such as electroretinography. The electroretinogram (ERG) is a transient action potential generated by the vertebrate retina in response to light. Using standardized stimulation, after assessing the normal(More)
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