NADPH diaphorase (nitric oxide synthase) in a part of the chick brain involved in imprinting.
The intermediate and medial part of the hyperstriatum ventrale (IMHV) is a memory system in the chick forebrain in which certain learning-related changes occur after imprinting. We have enquired whether NADPH-diaphorase, a presumed marker for nitric oxide synthase, is present in sections through the IMHV of chicks, either trained with an imprinting stimulus or dark-reared. Very few NADPH-d-positive cells were found in the IMHV (0.37 +/- 0.07 S.E.M. cells per 0.3 mm x 0.9 mm sampling frame), in contrast to the palaeostriatum augmentatum (PA) (19.47 +/- 0.77). Some stained cells in the PA were closely associated with blood vessels. The results do not support the hypothesis that learning-related changes in the IMHV depend on nitric oxide acting as a retrograde neuronal messenger.
Ambalavanar
R
R
Department of Zoology, University of Cambridge, UK.
McCabe
B J
BJ
Horn
G
G
D000594:Amino Acid Oxidoreductases / Q000378:metabolism*; D000822:Animal Husbandry; D000818:Animals; D002645:Chickens; D003624:Darkness; D007173:Imprinting, Psychological / Q000502:physiology*; D009252:NADPH Dehydrogenase / Q000378:metabolism*; D009474:Neurons / Q000201:enzymology; D019001:Nitric Oxide Synthase; D016548:Prosencephalon / Q000166:cytology / Q000201:enzymology* / Q000502:physiology*
D019001:Nitric Oxide Synthase; D000594:Amino Acid Oxidoreductases; D009252:NADPH Dehydrogenase