Binocular influences on global motion processing in the human visual system.

@article{citeulike:2795359, abstract = {This study investigates four key issues concerning the binocular properties of the mechanisms that encode global motion in human vision: (1) the extent of any binocular advantage; (2) the possible site of this binocular summation; (3) whether or not purely monocular inputs exist for global motion perception; (4) the extent of any dichoptic interaction. Global motion coherence thresholds were measured using random-dot-kinematograms as a function of the dot modulation depth (contrast) for translational, radial and circular flow fields. We found a marked binocular advantage of approximately 1.7, comparable for all three types of motion and the performance benefit was due to a contrast rather than a global motion enhancement. In addition, we found no evidence for any purely monocular influences on global motion detection. The results suggest that the site of binocular combination for global motion perception occurs prior to the extra-striate cortex where motion integration occurs. All cells involved are binocular and exhibit dichoptic interactions, suggesting the existence of a neural mechanism that involves more than just simple summation of the two monocular inputs.}, address = {McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, PQ, Que., Canada H3A 1A1. Robert.hess@mcgill.ca}, author = {Hess, R. F. and Hutchinson, C. V. and Ledgeway, T. and Mansouri, B. }, citeulike-article-id = {2795359}, doi = {http://dx.doi.org/10.1016/j.visres.2007.02.005}, issn = {0042-6989}, journal = {Vision research}, keywords = {depth-perception, global-motion, psychophysics}, month = {June}, number = {12}, pages = {1682--1692}, posted-at = {2008-05-13 16:14:53}, priority = {2}, title = {Binocular influences on global motion processing in the human visual system.}, url = {http://dx.doi.org/10.1016/j.visres.2007.02.005}, volume = {47}, year = {2007} }

TY - JOUR ID - citeulike:2795359 L3 - citeulike-article-id:2795359 TI - Binocular influences on global motion processing in the human visual system. JF - Vision research VL - 47 IS - 12 SP - 1682 EP - 1692 AD - McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, PQ, Que., Canada H3A 1A1. Robert.hess@mcgill.ca SN - 0042-6989 N2 - This study investigates four key issues concerning the binocular properties of the mechanisms that encode global motion in human vision: (1) the extent of any binocular advantage; (2) the possible site of this binocular summation; (3) whether or not purely monocular inputs exist for global motion perception; (4) the extent of any dichoptic interaction. Global motion coherence thresholds were measured using random-dot-kinematograms as a function of the dot modulation depth (contrast) for translational, radial and circular flow fields. We found a marked binocular advantage of approximately 1.7, comparable for all three types of motion and the performance benefit was due to a contrast rather than a global motion enhancement. In addition, we found no evidence for any purely monocular influences on global motion detection. The results suggest that the site of binocular combination for global motion perception occurs prior to the extra-striate cortex where motion integration occurs. All cells involved are binocular and exhibit dichoptic interactions, suggesting the existence of a neural mechanism that involves more than just simple summation of the two monocular inputs. KW - depth-perception KW - global-motion KW - psychophysics AU - Hess, RF AU - Hutchinson, CV AU - Ledgeway, T AU - Mansouri, B PY - 2007/06// UR - http://dx.doi.org/10.1016/j.visres.2007.02.005 ER -