Barlow, Matthew A Vagotonic effects of enkephalin are not mediated by sympatholytic mechanisms. [electronic resource] - Experimental biology and medicine (Maywood, N.J.) Apr 2006 - 387-95 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1535-3702 Standard No.: 10.1177/153537020623100404 doi Subjects--Topical Terms: 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer--pharmacologyAnimalsDogsEnkephalin, Methionine--analogs & derivativesFemaleHeart Rate--drug effectsMaleNaltrexone--analogs & derivativesReceptors, Opioid, kappa--agonistsSympatholytics--pharmacologyVagus Nerve--drug effects