Exact(2)
All stimulus sets included a common subset of reference faces (frontal view and gaze, centered in the visual field, 8 identities, 4 males/females, neutral expression).
Participants were comfortably seated with their chin positioned in a chin rest, their eyes open, and their gaze centered on a continuously displayed fixation cross (black on a gray background, RGB 192).
Similar(58)
For example, if the orbital position deviates to the left from the gaze center, it has been postulated that less activity may be required in the left SC to perform a saccade to the right (i.e., in centripetal direction) than performing an analogous rightward saccade that starts at the gaze center (i.e., in centrifugal direction).
A possible mechanism for the facilitation of re-centering (centripetal) saccades might be related to dynamic gain field modulations [e.g., 75] in collicular movement neurons during fixation, prior to the saccade, at positions away from the gaze center [70], [72].
The fast decoding of emotional face expressions is of particular importance not only at the gaze center where attention is focused, but also in the upper visual field where the eyes of other faces within the immediate social group are likely to be located.
IPS6, like other PPC subregions, represents contralateral space, whereas IPS7 represents ipsilateral space at gaze center.
This deviation is substantially smaller than observed changes in the BOLD response between gaze-up, gaze center, and gaze-down conditions (Figs. 2, 4, 5, 6).
For the gaze-center condition, there was a strong contralateral bias for memory-guided saccades.
Thus, in the three gaze-conditions (gaze-up, gaze-center, and gaze-down), the stimulated screen locations were completely non-overlapping.
In this case, the response for upper field positions was decreased in the gaze-up condition in comparison to gaze-center and gaze-down conditions.
Supplementary Fig. 9 shows phase maps from the polar angle scans for gaze-up, gaze-center, and gaze-down conditions in two subjects.
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