Endogenous opiates and behavioral responses to environmental novelty

Endogenous opiates and behavioral responses to environmental novelty.

Endogenous opiates (endorphins) mediate a variety of motivational and behavioral states. We examined the possible contributions of endorphins to the exploratory behavior of mice. Naloxone, ablocker of opiate receptors, depressed hole board exploratory activity and entry into a novel environment. It also reduced responding for sensory stimulation. Finally, a direct correlation w a s demonstrated...

Exercise and Endogenous Opiates

Exercise and Endogenous Opiates

The discovery of endogenous opiates in 1975 (1) generated considerable research concerning the effects of exercise on the release of these peptides, particularly on -endorphin, which represents the main focus of this chapter. Previous research considered changes in peripheral blood concentrations induced by different modes of physical activity, influences of training status on the secretion of ...

2 Exercise and Endogenous Opiates

The discovery of endogenous opiates in 1975 (1) generated considerable research concerning the effects of exercise on the release of these peptides, particularly on -endorphin, which represents the main focus of this chapter. Previous research considered changes in peripheral blood concentrations induced by different modes of physical activity, influences of training status on the secretion of ...

Quantifying aphid behavioral responses to environmental change

Aphids are the most common vector of plant viruses, and their feeding behavior is an important determinant of virus transmission. Positive effects of global change on aphid performance have been documented, but effects on aphid behavior are not known. We assessed the plant-mediated behavioral responses of a generalist aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae), to increased CO2 and n...