ENDOGENOUS OPIATES - 1993

This paper is the sixteenth installment of our annual review of resear ch concerning the opiate system. It is restricted to papers published during 1993 that concern the behavioral effects of the endogenous opia te peptides, and does not include papers dealing only with their analg esic properties. The specific topics this year include stress; toleran ce and dependence; eating; drinking; gastrointestinal, renal, and hepa tic function; mental illness and mood; learning, memory, and reward; c ardiovascular responses; respiration and thermoregulation; seizures an d other neurological disorders; electrical-related activity; general a ctivity and locomotion; development; immunological responses; and othe r behaviors.