This thesis investigates architectural prosthetics as "auxiliary organs", by examining the contemporary body and how it inhabits architecture. Greg Lynn in Body Matters states, "There are many variations of ideal or whole bodies in architecture, all of which result from a search for a universal model of symmetry and proportion for the regulation of whole bodies". To once again reintroduce the body in architecture, one cannot simply continue examining the body as an ideal to construct proportions. This re-introduction of the body in architecture is studied by establishing primitive relationships of how a body inhabits space. The program to investigate these relationships is a Medical Prosthetics Research Lab. The body is examined as two classes; the prosthetic body (use of prosthetic to replace a lost or damaged limb), and the post-body body (a normal body that wishes to extend its abilities through prosthetic devices).