Experimental design. A, Depiction of the encoding task (left) and cued-recall task (right). During encoding, stem-unique nouns are presented with occasional emotional nouns (E) and perceptually distinct nouns (P). During the cued-recall task, three letter stems of the nouns encoded on the first day are presented. The stems of the perceptual nouns are not presented in a distinct font. B, Schematic of the study design over 3 d. Note that propranolol is only administered on day 2. BP, Blood pressure measurement.