Another very common objection, one that is often leveled at many forms of motor theory, has to do with the fact that even paralyzed people, with very few possibilities for action, seem capable in many cases of normal spatial perception. Such objections would, at a minimum, place significant pressure on any views that explain perceptual content by appeal to actual behavior. It is also easy to see how even hypothetical behavior would be called into question in such cases, since in many such cases behavior is not physically possible. Grush’s theory (2007), right or wrong, has something specific to say about this objection. Since spatial content is taken to be manifested in the production of basis function values in the cortex, the prediction is that any impairments manifesting farther down the chain, the brain stem or spinal cord, for example, need have no direct effect on spatial content. So long as the relevant brain areas have the wherewithal to produce sets of basis function values suitable for constructing a motor sequence (if multiplied by the action-type-specific coefficients), then the occasioning perceptual episode will have spatial content.