The Role of Locus Coeruleus in the Regulation of Cognitive Performance Usher, Marius ; Cohen, Jonathan D. ; Servan-Schreiber, David ; Rajkowski, Janusz ; Aston-Jones, Gary Abstract Publication: Science Pub Date: January 1999 DOI: 10.1126/science.283.5401.549 Bibcode: 1999Sci...283..549U