Barbara Gail Montero

Proprioception - the sense by which we come to know the positions and movements of our bodies - is thought to be necessarily confined to the body of the perceiver. That is, it is thought that while proprioception can inform you as to whether your left knee is bent or straight, it cannot inform you as to whether someone else's knee is bent or straight. But while proprioception certainly provides us with information about the positions and movements of our own bodies, I will argue that it does more than that. Surprising as this may sound, one can proprioceive someone else's movement. To show this, I first present the results of some studies that suggest that in seeing others move, we kinesthetically represent their movement in our bodies. I then argue, by means of an analogy to prosthetic vision, that such 'kinesthetic vision' should count as proprioceiving others move

Proprioception has been considered, within neuroscience, in the context of the control of movement. Here we discuss a possible second role for this 'sixth sense', pleasure in and of movement,homologous with the recently described affective touch. We speculate on its evolution and place in human society and suggest that pleasure in movement may depend not on feedback but also on harmony between intention and action. Examples come from expert movers, dancers and sportsmen, and from those without proprioception due to neurological impairment. Finally we suggest that affective proprioception may help bind our sense of agency with our embodied selves at an emotional level.