1Multidisciplinary Center for the Study of Aging, Old Westbury Neuroscience Research
Institute, State University of New York at Old Westbury, Old Westbury, New York, 11568 …

Morphine is a plant (opium poppy)-derived alkaloid and one of the strongest known
analgesic compounds. Studies from several laboratories have suggested that animal and …

This paper is the twenty-fifth consecutive installment of the annual review of research
concerning the endogenous opioid system, now spanning over a quarter-century of …

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 …

Morphine is a major constituent of opium. Knowledge of opium, as a powerful remedy for
pain, led to the development of morphine as a narcotic analgesic. It had been recognized for …

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 thirty-third consecutive installment of the annual review of research
concerning the endogenous opioid system. It summarizes papers published during 2010 …

It is now well accepted that endogenous morphine is present in animals, both in
invertebrates and vertebrates. It is a key signaling molecule that plays an important role in …

This paper is the thirty-fourth consecutive installment of the annual review of research
concerning the endogenous opioid system. It summarizes papers published during 2011 …

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 …