منابع مشابه
Rapid shape detection signals in area V4
Vision in foveate animals is an active process that requires rapid and constant decision-making. For example, when a new object appears in the visual field, we can quickly decide to inspect it by directing our eyes to the object's location. We studied the contribution of primate area V4 to these types of rapid foveation decisions. Animals performed a reaction time task that required them to rep...
متن کاملPopulation coding in area V4 during rapid shape detections.
While previous studies have suggested that neuronal correlations are common in visual cortex over a range of timescales, the effect of correlations on rapid visually based decisions has received little attention. We trained Macaca mulatta to saccade to a peripherally presented shape embedded in dynamic noise as soon as the shape appeared. While the monkeys performed the task, we recorded from n...
متن کاملThe Fine Structure of Shape Tuning in Area V4
Previous studies have shown that neurons in area V4 are involved in the processing of shapes of intermediate complexity and are sensitive to curvature. These studies also suggest that curvature-tuned neurons are position invariant. We sought to examine the mechanisms that endow V4 neurons with these properties. Consistent with previous studies, we found that response rank order to the most- and...
متن کاملShape Perception: Complex Contour Representation in Visual Area V4
A recent study has put forward a physiologically plausible population model that implements a parts-based shape-coding scheme for macaque visual area V4.
متن کاملSpectral receptive field properties explain shape selectivity in area V4.
Neurons in cortical area V4 respond selectively to complex visual patterns such as curved contours and non-Cartesian gratings. Most previous experiments in V4 have measured responses to small, idiosyncratic stimulus sets and no single functional model yet accounts for all of the disparate results. We propose that one model, the spectral receptive field (SRF), can explain many observations of se...
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ژورنال
عنوان ژورنال: Frontiers in Neuroscience
سال: 2014
ISSN: 1662-453X
DOI: 10.3389/fnins.2014.00294