The Shape of Air: American Sign Language as Narrative Prosthesis in 21st Century North American Media

The word “prosthetic” has its origins as a mathematical term. According to scholar Brandon W. Hawk, Plato uses the words prosthesis and prostithenai in Phaedo to mean "addition, add to, to place", and Aristotle uses it in a similar, algebraic sense in the Metaphysics. Later, as the word appears in classical Latin, it is used as a grammatical and rhetorical term, in the sense of a letter or syllable that is added on to a word, usually the addition of a syllable to the beginning of a word, hence pro-thesis (Hawk). This is the sense of the word that was “inherited … by early modern humanists”, says Hawk, but when it appears in Edward Phillips's The New World of English Words: Or, a General Dictionary (1706), we can see how, with advances in technology, it changes from a grammatical/linguistic term into a medical term. What was once word is now made flesh:Prosthesis, a Grammatical Figure, when a Letter or Syllable is added to the beginning of a Word, as Gnatus for natus, tetuli for tuli, &c. In Surgery, Prosthesis is taken for that which fills up what is wanting, as is to beseen in fistulous and hollow Ulcers, filled up with Flesh by that Art: Also themaking of artificial Legs and Arms, when the natural ones are lost.Hawk also points to P. Dionis in Course Chirurg (a 1710 textbook detailing the art of chirurgy, or surgery, as it’s known now), who uses the word to denote one type of surgical operation; that is, prosthesis becomes not a word, but an act that “adds what is deficient”, an act that repairs loss, that “fills up what is wanting”, that fills up what is “hollow”, that “fills up with flesh”. R. Brookes, in his Introduction to Physic and Surgery (1754), is the first to define prosthesis as both an act and also as a separate, material object; it is “an operation by which some instrument is added to supply the Defect of a Part which is wanting, either naturally or accidentally”. It is not until the twentieth century (1900, to be exact), though, that the word begins to refer solely to a device or object that is added on to somehow “supply the defect”, or fill up what which is “wanting”. So etymologically we move from the writer creating a new literary device, to the scientist/doctor acting in order to fix something, then back to the device again, this time as tangible object that fills a gap where there is lack and loss (Hawk).This is how we most often see the word, and so we have the notion of prosthetic used in this medicalised sense, as an "instrument",