1 the actions of morphine , methionine and leucine enkephalin , administered electrophoretically , were studied on supraspinal neurones in the cortex and brainstem of the rat anaesthetized with urethane and on spinal renshaw cells and dorsal horn interneurones in the cat anaesthetized with pentobarbitone.2 the majority of renshaw cells and cortical and brainstem neurones were excited by all three compounds although some supraspinal neurones were depressed.3 naloxone reversibly antagonized both excitatory and depressant actions of morphine and enkephalin .
C0014294
leucine enkephalin
C0014298
enkephalin