However, when the head is rotated, the direct gaze should be calculated on the basis of the relationship between the position of the iris and the degree of head rotation [25].
Recurrence was defined as eyelash-eyeball contact in all positions of gaze or inward rotation of the lid margin.
With the head facing the right marker, the eyes were then to focus on the left marker, followed by the leftwards rotation of the head with fixed gaze.
Thus, a saccadic gaze strategy that segregates rotations from translational movements during locomotion will facilitate extraction of spatial information from the visual input.
In both of our monkeys about half of the FEF gaze-velocity neurons responded vigorously to neck rotation when it was delivered by rotating the body beneath a fixed head but much more weakly when such rotation occurred as part of forced rotation of the head on the trunk (Fig. 8 B – C, H ).
We compensated the rotation angle of head or eye movement (gaze angle) in front of the retina fundus camera using phase correlation technique which was not mentioned in the counterpart methods.
For instance, rapid changes of gaze direction require fast cervical rotations if the magnitude of gaze change is large.
Despite the Eyelink system's high resolution, our use of gaze position data (rather than eye rotation angles) may introduce slight inaccuracies in the velocity calculation, which may not be truly representative of eye rotation velocity i.e. our measure reflects more accurately the speed of gaze displacement across the screen.
Gaze stability (GS) was registered during rotation, flexion and extension movements as positive/negative based on the patients report of symptoms such as nausea, dizziness, disturbed vision.
We propose a two-layer neuromorphic architecture by which motion field pattern, generated during locomotion, are processed by template detectors specialized for gaze-directed self-motion (expansion and rotation).
