The tactile and auditory dimensions were not simply added to the domain of vision. The sensorial triangulation indispensable to anatomo-clinical perception remains under the dominant sign of the visible…Thus, from the discovery of pathological anatomy the medical gaze is duplicated: there is a local, circumscribed gaze, the borderline gaze of touch and hearing, which covers only one of the sensorial fields, and which operates on little more than the visible surfaces... (Foucault, 1994, pp. 165-166)