This paper is the thirty-eighth consecutive installment of the annual review of research
concerning the endogenous opioid system. It summarizes papers published during 2015 …

This paper is the twenty-third installment of the annual review of research concerning the
opiate system. It summarizes papers published during 2000 that studied the behavioral …

This paper is the twenty-second installment of the annual review of research concerning the
opiate system. It summarizes papers published during 1999 that studied the behavioral …

This paper is the twenty-first installment of our annual review of research concerning the
opiate system. It summarizes papers published during 1998 that studied the behavioral …

This paper is the twentieth installment of our annual review of research concerning the
opiate system. It summarizes papers published during 1997 that studied the behavioral …

This article is the eighteenth installment of our annual review of research concerning the
opiate system. It includes articles published during 1995 reporting the behavioral effects of …

The opioid system controls nociception, stress responses, and addictive behaviors.
Exogenous alkaloid opiates and endogenous opioid peptides stimulate mu-, delta-and …

It is now well established that opiate drugs, such as heroin and morphine exert their primary
effects by mimicking naturally occurring substances, termed the opioid peptides or …

In the mid-1970s, an intense race to identify endogenous substances that activated the
same receptors as opiates resulted in the identification of the first endogenous opioid …

This review describes the emergence of the opioid field, in terms of both endogenous
peptides and their receptors. It discusses the basic elements of the opioid system with …