|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
|
Fig. 4. Turning responses to motion in the rear quarter-fields are
non-directionally selective. Motion across the front half-field (A) or the
constituent quarter-fields (B,C) generates turning responses that follow the
sign of image motion (D). Front quarter-field motion produces saturated
responses, thus the sum of responses (dotted red line in A) exceeds responses
to half-field motion. (E) Motion across the rear half-field generates
counterdirectional turning responses. However, responses to motion restricted
to constituent quarter-fields show a sign inversion (F,G). Both clockwise and
counterclockwise motion centered in a rear quarter-field triggers clockwise
turns (G,H). Assuming bilateral symmetry, data from F are inverted and
re-plotted here. As a consequence, the sum of rear quarter-field responses
(dotted red line in E) does not approximate the response to half-field motion.
This indicates non-linear processing of binocular motion information in the
rear part of the visual field.
|
