Hypothalamic electrical activity that relates to the pulsatile release of luteinizing hormone exhibits diurnal variation in ovariectomized rats
H Hiruma, M Nishihara, F Kimura�- Brain research, 1992 - Elsevier
H Hiruma, M Nishihara, F Kimura
Brain research, 1992•ElsevierThe multiunit activity (MUA) was recorded in the arcuate nucleus-median eminence region
in freely moving ovariectomized rats maintained under controlled lighting conditions (lights
on 05.00–19.00 h) over a period of 24 h. The MUA of each rat had been confirmed to exhibit
characteristic increases (volleys) in association with pulses of luteinizing hormone. In 6
MUAs examined, the frequency of MUA volleys was significantly greater in the dark period
than in the light period, suggesting a diurnal variation in the release of luteinizing hormone�…
in freely moving ovariectomized rats maintained under controlled lighting conditions (lights
on 05.00–19.00 h) over a period of 24 h. The MUA of each rat had been confirmed to exhibit
characteristic increases (volleys) in association with pulses of luteinizing hormone. In 6
MUAs examined, the frequency of MUA volleys was significantly greater in the dark period
than in the light period, suggesting a diurnal variation in the release of luteinizing hormone�…
Abstract
The multiunit activity (MUA) was recorded in the arcuate nucleus-median eminence region in freely moving ovariectomized rats maintained under controlled lighting conditions (lights on 05.00–19.00 h) over a period of 24 h. The MUA of each rat had been confirmed to exhibit characteristic increases (volleys) in association with pulses of luteinizing hormone. In 6 MUAs examined, the frequency of MUA volleys was significantly greater in the dark period than in the light period, suggesting a diurnal variation in the release of luteinizing hormone-releasing hormone in the ovariectomized rat.
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