PMID: 7512626Jan 1, 1994Paper

Modulatory influence of putative inhibitors of nitric oxide synthesis on visual processing in the cat lateral geniculate nucleus

Journal of Neurophysiology
J CudeiroJ M Alonso

Abstract

1. Using an in vivo preparation we have examined the actions of two inhibitors of nitric oxide synthase (NOS), NG-nitro-L-arginine (L-NOArg) and NG-methyl-L-arginine (L-MeArg), in the feline dorsal lateral geniculate nucleus (dLGN). We compared the responses obtained to iontophoretic application of these substances during visual stimulation with those elicited by visual stimulation alone. The effects of concurrent ejection of L-arginine (L-Arg), the normal physiological substrate of NOS, and D-arginine, the inactive isomer, were tested on these responses. 2. Extracellular application of L-NOArg and L-MeArg produced clear and repeatable effects, consisting of substantial reduction in discharge rate without affecting response selectivity, on 94% of tested cells. These effects were prevented by simultaneous application of L-Arg, which when ejected alone produced no change on visual evoked responses. 3. The data suggest that nitric oxide (NO) is necessary for the transmission of the visual input under normal visual stimulation and show a direct involvement of NO in visual information processing at the level of dLGN, suggesting that its contribution to brain mechanisms is more profound than previously thought.

Citations

Jan 1, 1996·The European Journal of Neuroscience·J CudeiroC Acu-na
Dec 1, 1996·The European Journal of Neuroscience·C RivadullaJ Cudeiro
Aug 10, 2000·The Journal of Comparative Neurology·M E BickfordS M Sherman
May 2, 2003·Journal of Neurophysiology·Guo-Yong WangLeo M Chalupa
Mar 9, 2012·Current Pain and Headache Reports·Anna Steinberg, A Ingela M Nilsson Remahl
Jun 17, 2003·Cephalalgia : an International Journal of Headache·M Empl, G Giovannoni
Jun 7, 2008·The Journal of Physiology·Sunggu Yang, Charles L Cox
May 17, 2003·European Journal of Ophthalmology·C NucciG Bagetta

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