Canna~Fangled Abstracts Periaqueductal gray glutamatergic, cannabinoid and vanilloid receptor interplay in defensive behavior and aversive memory formation. Neuropharmacology. 2018 Mar 26. pii: S0028-3908(18)30144-8. doi: 10.1016/j.neuropharm.2018.03.032. Back FP1, Carobrez AP2. Author information Abstract…Freedom WaresMarch 26, 2018