Lesions designed to ascertain the separate roles of area 17 and 18 suggest that functions such as the processing of orientation, motion, and spatiotemporal thresholds are best described as being shared or distributed between the two areas with some specialization for stimuli with certain dimensions or temporal properties.
The processing of orientation and curvature in the brain's retinotopic areas is based on two dimensional projections of three-dimensional objects and scenes.
Furthermore, a study showing that a region within the IPS is activated both by visual and tactile orientation tasks ([52] 30 −54 56; MNI) suggests that regions of the PPC may underlie multisensory processing of orientation.
The cIPS/PPC has been implicated in mental rotation [61], [62], the processing of object orientation during reaching and grasping [19] and orientation discrimination / classification of 2D / 3D shapes, graspable objects and surfaces [19], [20], [49], [48], [63] [65].
The first experiment examined the combined processing of color, orientation, and shape of Gabor patches in a fully crossed design.
Such information regarding processing of color, orientation, and shape can be applied to research designs incorporating real world scenarios in an effort to gain greater understanding of the mechanisms behind compound, multi-feature stimuli in realistic settings.
The item-total correlation (Table 1) correlated well with information processing (attention, processing of commands, orientation) and behaviour (appearance, motor, verbal) (Pearson r = 0.68), while the urinary continence control (Pearson r 0.24) and vital function/oxygen saturation (Pearson r = 0.20) correlated weakly or not at all with the item-total coefficient of correlation.
However independent processing of different orientations is not a feasible premise.
Both the contour segments, and background noise elements are small oriented Gabor elements, which are designed to be well-matched to the spatial frequency processing characteristics of orientation-selective simple cells in primary visual cortex (V1); therefore they are ideal for the examination of these features and their integration.
In this work, we focus on the processing of the local orientation of visual stimuli which is reflected by the ability of some neurons to fire only when a drifting grating of specific (called preferred) orientation is presented in their receptive field.
We used stimuli rotated in the image plane because this case affords the clearest dissociation between processing of shape and orientation without the added complications of feature occlusion and shape distortions that are introduced by rotations in depth.
