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. 2015 Jun 10;9:72. doi: 10.3389/fncom.2015.00072

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Copyright © 2015 Daemi and Crawford.

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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Distributions of head, eye, and gaze orientations for two extreme cases of almost only eye contribution (head-fixed Saccade) and almost only head contribution. We have made the model to plan gaze-shifts from the central fixation point (reference condition) to a uniform distribution of targets on the screen in range (−40, 40) degrees horizontal and (−40, 40) degrees vertical. Eye-in-head (first column in red), head-in-space (second column in green), and eye-in-space (third column in blue) orientations are illustrated. Only the horizontal (right-left) against the torsional (CW/CCW) diagrams are included in this figure. The parameters of the model for the first row (A–C) is set to α = β = 0.15 and δ = 0.5 while for the second row (D–F) they are set to be α = β = 0.85 and δ = 0.5. The black curve shows gaze orientations for targets aligned horizontally on top of the screen.