Physics and Psychology of the Muscle Sense

The sensibility associated with muscles contributes little to the conceptual content of current psychology. In part, this is because perceptions achieved through the muscle sense typically go unnoticed. Nonetheless, researchers have discovered a rich variety of muscle-based perceptual capabilities—such as those relating to held objects, probed objects, and body segments—that seem to depend on quantities well known in physics, quantities that reflect how the mass of an object or limb is distributed. The conceptual and technical issues posed by these capabilities warrant study by psychologists interested in the general problems of space perception, action, and selective attention.