Electrical Stimulation of the Hypothalamic Paraventricular Nuclei Inhibits Pineal Melatonin Synthesis in Male Rats

1985 ◽  
Vol 41 (3) ◽  
pp. 192-196 ◽  
Author(s):  
Stefan Reuss ◽  
James Olcese ◽  
Lutz Vollrath
Keyword(s):  
Electrical Stimulation ◽  
Male Rats ◽  
Pineal Melatonin ◽  
Melatonin Synthesis ◽  
Paraventricular Nuclei ◽  
Stimulation Of ◽  
Hypothalamic Paraventricular Nuclei

OVULATORY DISCHARGE OF GONADOTROPHINS INDUCED BY HYPOTHALAMIC STIMULATION IN CASTRATED MALE RATS BEARING A TRANSPLANTED OVARY

1966 ◽  
Vol 51 (2) ◽  
pp. 281-289 ◽  
Author(s):  
J. Moll ◽  
G. H. Zeilmaker
Keyword(s):  
Electrical Stimulation ◽  
Preoptic Area ◽  
Hypothalamic Stimulation ◽  
Male Rats ◽  
Corpora Lutea ◽  
Histological Changes ◽  
Experimental Animals ◽  
Cumulus Oophorus ◽  
Dc Current ◽  
Stimulation Of

ABSTRACT Castrated young adult inbred male rats bearing ovarian transplants were subjected to electrical stimulation of the hypothalamus. This was done in order to investigate whether discharge of ovulatory amounts of gonadotrophins could be induced in such male animals by this procedure. Bilateral stimulations with unipolar electrodes and a DC current of 1.5 mA applied during 10 seconds induced in the ovarian grafts histological changes indicating the discharge of ovulatory amounts of gonadotrophins. In animals killed one day after stimulation these changes consisted of displacement of the ova towards the centre of the follicles with loosening of the cumulus oophorus. In one animal the ova had left the follicles. In animals killed three days after stimulation numerous young corpora lutea could be observed. These results were obtained with electrode tips either close to the median eminence, or in the preoptic area. Shamstimulations were ineffective. Some of the experimental animals received progesterone pretreatment. This rendered the stimulations ineffective, if continued until the day preceding stimulation, but seemed without effect on the results of stimulation, if two or three days without progesterone preceded the stimulations.

Electric field exposure alters serum melatonin but not pineal melatonin synthesis in male rats

1994 ◽  
Vol 15 (5) ◽  
pp. 427-437 ◽  
Author(s):  
L. J. Grota ◽  
R. J. Reiter ◽  
P. Keng ◽  
S. Michaelson
Keyword(s):  
Electric Field ◽  
Male Rats ◽  
Field Exposure ◽  
Pineal Melatonin ◽  
Melatonin Synthesis

Involvement of 5-Lipoxygenase Pathway in Norepinephrine Stimulation of Rat Pineal Melatonin Synthesis

1987 ◽  
Vol 46 (5) ◽  
pp. 412-416 ◽  
Author(s):  
Maria I. Vacas ◽  
Maria I. Keller-Sarmiento ◽  
Graciela S. Etchegoyen ◽  
Elba N. Pereyra ◽  
Martha F. Gimeno ◽  
...  
Keyword(s):  
Lipoxygenase Pathway ◽  
Pineal Melatonin ◽  
Melatonin Synthesis ◽  
Stimulation Of

scholarly journals Effects of Electrical Stimulation of the Brain on Gonadotropin Secretion in Male Rats

1973 ◽  
Vol 20 (5) ◽  
pp. 447-454 ◽  
Author(s):  
MASAZUMI KAWAKAMI ◽  
FUKUKO KIMURA ◽  
TAKASHI HIGUCHI
Keyword(s):  
Electrical Stimulation ◽  
Male Rats ◽  
Gonadotropin Secretion ◽  
The Brain ◽  
Stimulation Of
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