We test a biologically motivated filtering method [9] for noise decreasing in optical flow fields.Our filter model adopts a property of a particular motion sensitive area of the brain which represents the average incoming motion signals over domains whose size increases with the distance from the center of the projection. We use the task of heading detection from optic flow as a way to estimate...

In this study, quantitative trait loci (QTLs) controlling rice heading date were detected in a F2:3 population derived from a cross between an indica rice variety, Tarom Mahalli, with early heading date, and an indica variety, Khazar, with late heading date. SSR linkage map was constructed using 74 polymorphic markers and 192 F2 individuals and covered a total of 1231.50 cM of rice genome. QTL ...

Visual and vestibular signals converge onto the dorsal medial superior temporal area (MSTd) of the macaque extrastriate visual cortex, which is thought to be involved in multisensory heading perception for spatial navigation. Peripheral otolith information, however, is ambiguous and cannot distinguish linear accelerations experienced during self-motion from those resulting from changes in spati...

How does the brain process visual information about self-motion? In monkey cortex, the analysis of visual motion is performed by successive areas specialized in different aspects of motion processing. Whereas neurons in the middle temporal (MT) area are direction-selective for local motion, neurons in the medial superior temporal (MST) area respond to motion patterns. A neural network model att...

31 Self-motion generates patterns of optic flow on the retina. Neurons in area MSTd are 32 selective for these optic flow patterns. It has been shown that neurons in this area that are 33 selective for expanding optic flow fields are involved in heading judgments. We 34 wondered how subpopulations of MSTd neurons – those tuned for expansion, rotation or 35 spiral motion – contribute to heading ...

A simple linear neural network modelled on areas MT and MST of primate visual cortex can determine the direction of self-motion of an observer by using the optical flow field induced by observer translation relative to a rigid planar environment. The model's input layer consists of a set of motion detectors covering a 20 x 20 portion of the visual field with a subset of eight detectors selectiv...