Proprioception and Sedentary Observation

Descartes' segue from sedentary observer to disembodied consciousness might be less seamless if he took into account the prequel to this prototypical philosophical scenario--e. g. his walking into the room, and lowering himself into the chair.  For, he might then not as easily abstract from Proprioception, of which the awareness of one as seated is a special case, in the process.  Accordingly, insofar as his procedure helps establish the 'detached' observer as the paradigmatic subject of modern Philosophy, that tradition suppresses Proprioception from its outset.