Abstract
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.
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