Vector subtraction using visual and extraretinal motion signals: a new look at efference copy and corollary discharge theories

Journal of Vision
John A Perrone, Richard J Krauzlis

Abstract

The question as to how the visual motion generated during eye movements can be 'canceled' to prevent an apparent displacement of the external world has a long history. The most popular theories (R. W. Sperry, 1950; E. von Holst & H. Mittelstaedt, 1950) lack specifics concerning the neural mechanisms involved and their loci. Here we demonstrate that a form of vector subtraction can be implemented in a biologically plausible way using cosine distributions of activity from visual motion sensors and from an extraretinal source such as a pursuit signal. We show that the net result of applying an 'efference copy/corollary discharge signal' in the form of a cosine distribution is a motion signal that is equivalent to that produced by vector subtraction. This vector operation provides a means of 'canceling' the effect of eye movements. It enables the extraretinal generated image motion to be correctly removed from the combined retinal-extraretinal motion, even in cases where the two motions do not share the same direction. In contrast to the established theories (efference copy and corollary discharge), our new model makes specific testable predictions concerning the location (the MT-MST/VIP areas) and nature of the eye-rotation cancel...Continue Reading

Citations

Nov 4, 2015·Vision Research·Garrett GreeneThomas Wachtler
Apr 23, 2014·Vision Research·Jeremy D FesiRick O Gilmore
Aug 11, 2010·Brain Research Reviews·R W Guillery, S Murray Sherman
Sep 29, 2011·Annals of the New York Academy of Sciences·L F Dell'Osso
Aug 25, 2010·Vision Research·Emer O'ConnorTom C A Freeman
Apr 20, 2010·Current Biology : CB·Tom C A FreemanPaul A Warren
Apr 10, 2013·Accident; Analysis and Prevention·Helen E ClarkRobert B Isler
May 25, 2011·Vision Research·J Rhys Davies, Tom C A Freeman
Dec 25, 2010·Perception·Stuart Anstis, Hiroyuki Ito

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