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Exp Clin Endocrinol Diabetes 1984; 84(5): 228-234
DOI: 10.1055/s-0029-1210392
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© J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart · New York

Dissociation of Prolactin and LH Release Responses after Stimulation within the Preoptic-Suprachiasmatic Region in Male Rats

J. A. Colombo
  • Department of Anatomy (Dr. J. A. G. Rhodin) University of South Florida
Further Information

Publication History

1983

Publication Date:
17 July 2009 (online)

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Summary

The relative efficiency of unilateral electrical stimuli applied within the preoptic-suprachiasmatic region (POA-Sch) to induce the release of prolactin and/or LH was studied in male rats under pentobarbital anesthesia. It was observed that unilateral stimulation with 10 Hz, 1.0 msec width pulses applied in the ventral half of the POA-Sch resulted primarily in the release of prolactin rather than LH. Fifty Hz stimuli applied at this same locus resulted also in LH release. It is concluded that the probability to dissociate the induced release of prolactin and LH from the anterior pituitary in male rats after stimulation from a given locus within the ventral POA-Sch is significantly affected by the characteristics of the applied stimulus.

Key words

Preoptic-Suprachiasmatic region - electrical stimulation - LH - PRL