The title of The Semi-Circular Canals refers to the portion of the human ear that regulates balance. Viola constructed a platform on which he and the recording equipment counterbalanced one another, while freely suspended from a large tree. The artist appears to be sitting calmly at the center of the universe as the earth rotates. He writes, "The tape was inspired by NASA films and develops references to cosmological cycles, with the individual at the rotational center of their universe."