Unexpressed morphine conditioned salt aversion: procedural variants and hypertonicity of salt.


Previous work has demonstrated that rats that received a sodium chloride (salt) solution paired with a high dose of morphine do not directly express a conditioned salt aversion (decreased intake) in a one-bottle test. Importantly, lithium conditioned salt aversions and morphine conditioned saccharin aversions are readily expressed. The present study… (More)


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