Blake E Butler1, M Alex Meredith2, Stephen G Lomber3. 1. Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada. Electronic address: bbutler9@uwo.ca. 2. Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA, USA. Electronic address: marvin.meredith@vcuhealth.org. 3. Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada; Department of Psychology, University of Western Ontario, London, Ontario, Canada. Electronic address: steve.lomber@uwo.ca.