The prefrontal cortex is one of the last brain regions to complete its maturation

The suppression of gaping by URB was reversed by pre-treatment with the CB1 antagonist/inverse agonist, SR141716A, suggesting a CB1 mechanism of action. URB also interfered with the establishment of conditioned gaping when administrated before each pairing of the contextual stimuli with LiCl. This finding was consistent with that recently reported by Cross-Mellor et al. demonstrating that…