Opher Donchin a1andAmir Raz a2 a1 Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21205
[email protected]http://www.bme.jhu.edu/~opher a2 Department of Psychiatry, Division of Child and Adolescent Psychiatry, Columbia University College of Physicians and Surgeons and New York State Psychiatric Institute, New York, NY 10032
The general applicability of forward models in brain function has previously been recognized. Grush's contribution centers largely on broadening the extent and scope of forward models. However, in his effort to expand and generalize, important distinctions may have been overlooked. A better grounding in the underlying physiology would have helped to illuminate such valuable differences and similarities.