The aim of this thesis is to study Viking Eggeling?s artwork Diagonal Symphony together with Eggeling?s own art theoretical writings. This method of reading Eggeling?s art theoretical writings with the aim to try and create a deeper understanding of his art and especially Diagonal Symphony is a new approach in Eggeling?s art historical discourse. The thesis starts with a description of how the field of art history has understood Eggeling and his art primarily through art historical research aimed at Hans Richter.

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The aim of the thesis is to explore how the human subject is depicted in contemporary posthumancinema and how these films effect our comprehension of human subjectivity. The object of analysis isJames Cameron?s Avatar (2009) and the method of analysis is cybernetic and intermedial. The conclusionis that Avatar is a film that depicts a posthuman network society where existence and subjectivity in a greatvariety of forms is possible. The film presents posthuman subjects in symbiosis with avatars, terminals,extensions and prothesis.