a1 Department of Cell and Developmental Biology, Vanderbilt Vision Research Center, Vanderbilt University, Nashville, TN 37232; email@example.com
a2 College of Optometry and Center for Neuro-Engineering and Cognitive Science, University of Houston, Houston, TX 77204-2020; Hbedell@optometry.uh.edu
a3 Department of Electrical and Computer Engineering, Center for Neuro-Engineering and Cognitive Science, University of Houston, Houston, TX 77204-4005; firstname.lastname@example.org http://www.egr.uh.edu/ece/faculty/ogmen/
a4 Department of Neurobiology and Anatomy, University of Texas Medical School at Houston, Houston, TX-77030. email@example.com
Speculation by Nijhawan that visual perceptual mechanisms compensate for neural delays has no basis in the physiological properties of neurons known to be involved in motion perception and visuomotor control. Behavioral and physiological evidence is consistent with delay compensation mediated primarily by motor systems.