And if I wish to resist that upward force, I can do so by constructing a downward force field in the perceptual representation, equal and opposite to the force I wish to resist. This motor force field is a spatial thought, that appears under voluntary control, and it acts on the body image as a motor command to move the limb, expressed in analogical form as a spatial force field in perceived space.

© 2003 Steven Lehar, Manchester, MA USA. All rights reserved.