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Effects of local illumination of the hypothalamus on spontaneous and flash‐induced multiunit activity recorded from the gonadotropic hypothalamic areas in quail
Author(s) -
Oliver J.,
Baylé J. D.
Publication year - 1976
Publication title -
journal of neuroscience research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.72
H-Index - 160
eISSN - 1097-4547
pISSN - 0360-4012
DOI - 10.1002/jnr.490020514
Subject(s) - photostimulation , quail , hypothalamus , medicine , endocrinology , population , biology , chemistry , neuroscience , environmental health
Abstract Multiple unit activity (MUA) was obtained from gonadotropic areas of the hypothalamus in quail. Pellets of radioluminous paint (RLP) were implanted unilaterally either in the nucleus tuberis or in the n. posterior medialis hypothalami. Control data were obtained from birds receiving nonluminous material (RP). Spontaneous MUA was decreased by 25% in gonadotropic areas in RLP‐treated quail. Direct permanent photostimulation of hypothalamic neuronal population was not as effective in decreasing MUA as environmental photostimulation (50%). Activation in firing rats, which was constant in nonphotostimulated intact birds in response to repetitive flash‐light stimulations, was completely suppressed after implantation of RLP.