The phrase synesthesia in art has historically referred to a wide variety of artists' experiments that have explored the co-operation of the senses (e.g. seeing and hearing; the word synesthesia is from the Ancient Greek σύν (syn), "together," and αἴσθησις (aisthēsis), "sensation") in the genres of visual music, music visualization, audiovisual art, abstract film, and intermedia (Campen 2007, Jewanski & Sidler 2006, Moritz 2003, 1999, Berman 1999, Maur 1999, Gage 1994, 1999). The age-old artistic views on synesthesia have some overlap with the current neuroscientific view on neurological synesthesia, but also some major differences, e.g. in the contexts of investigations, types of synesthesia selected, and definitions. While in neuroscientific studies synesthesia is defined as the elicitation of perceptual experiences in the absence of the normal sensory stimulation, in the arts the concept of synaesthesia is more often defined as the simultaneous perception of two or more stimuli as one gestalt experience (Campen 2009).