This paper is the 28th consecutive installment of the annual review of research concerning
the endogenous opioid system, now spanning over a quarter-century of research. It …

This paper is the 29th consecutive installment of the annual review of research concerning
the endogenous opioid system, now spanning 30 years of research. It summarizes papers …

This paper is the thirty-fifth consecutive installment of the annual review of research
concerning the endogenous opioid system. It summarizes papers published during 2012 …

This paper is the thirty-seventh consecutive installment of the annual review of research
concerning the endogenous opioid system. It summarizes papers published during 2014 …

This paper is the forty-fifth consecutive installment of the annual anthological review of
research concerning the endogenous opioid system, summarizing articles published during …

This paper is the thirty-ninth consecutive installment of the annual review of research
concerning the endogenous opioid system. It summarizes papers published during 2016 …

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 …

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