1. Department of General Physiology, St. Petersburg State University, 199034 St. Petersburg, Russia
2. Interoception Laboratory, Pavlov Institute of Physiology RAS, 199034 St. Petersburg, Russia
3. Department of Higher Nervous Activity and Psychophysiology, St. Petersburg State University, 199034 St. Petersburg, Russia
4. Institute of Veterinary Physiology, Freie Universität Berlin, 14163 Berlin, Germany