1 23 Psychopharmacology ISSN 0033-3158 Psychopharmacology DOI 10.1007/s00213-012-2811-0 The NMDA antagonist ketamine and the 5-HT agonist psilocybin produce dissociable effects on structural encoding of emotional face expressions André Schmidt, Michael Kometer, Rosilla Bachmann, Erich Seifritz & Franz Vollenweider