Assertion: dopamine's effect | /r/HasProperty | cabib et al.
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text: For example, initial studies employing pharmacological approaches have shown that mice or rats pre-treated with the D1 receptor antagonist SCH 23390 showed an attenuated locomotor response to acute cocaine challenge, while the D2 receptor antagonists haloperidol, and raclopride had no such effect (Cabib et al., 1991; Ushijima et al., 1995; Hummel and Unterwald, 2002).