TY JOUR TI COMPOSITIONAL (NON-)FORMULA: VIEWER (RECIPIENT) AND ARTIST (MASTER) AS PHILOMATICS. PART 2.4.1 BRAIN OR HEART: OPTICAL CONCEPTS OF THE KOS SCHOOL KW visual thinking KW ancient physiology of vision KW psychic pneuma KW imagination KW artistic image KW optics KW School of Kos KW Hippocrates KW Praxagoras KW cardiocentrism KW encephalocentrism JO Siberian Art History Journal AU Kopceva, N.P. PY 2026 IS 5 PB Krasnoyarsk regional public organization Commonwealth of Enlighteners of Krasnoyarsk