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  • Melatonin  (1)
  • 1
    ISSN: 1432-2072
    Keywords: Arginine vasotocin ; Melatonin ; Exploration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Synthetic arginine vasotocin (AVT) was infused into rat brains either by intraventricular administration or by local infusion on the pineal body. Subsequently, exploratory behavior was analyzed in a hole board. The behavioral effects induced by this peptide were dependent on the time of day, i. e. the light or the dark phase. High intraventricular doses (0.4 μg) administered during the light phase altered exploratory activity such that the number of hole visits was increased, while the duration of each visit was decreased; lower doses producted no effect. In contrast, during the dark phase, peripineal infusion of AVT (10-4 pg) attenuated the number of hole visits and increased the mean duration of the visits. The strongest effects were obtained with peripineal applications during the dark phase. This treatment also resulted in significantly lowered levels of pineal melatonin.
    Type of Medium: Electronic Resource
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