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. 2016 Jun 2;10:52. doi: 10.3389/fncom.2016.00052

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Copyright © 2016 Rao, San Juan, Shen, Villa, Rafie and Sommer.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Relative influence of visual vs. CD signals in the FEF sheet. During training, a visual stimulus was always present on every trial. Fully trained networks were then tested in a no-stimulus condition, which were normal trials except that the visual stimulus was omitted. As shown for this example trial, in the absence of a visual stimulus the FEF sheet showed no activity (A) long before the saccade, (B) just before the saccade even though CD activity was present, and (C) after the saccade. Consistent with FEF activity driven by visual driving input but modulated by CD input, the weights of connections onto the Hidden layer were much higher from (D) the Retina sheet (average 0.113) than from (E) the SC sheet (average 0.046).