Vergence behavior on moving objects  

		15 Dec 2010 - Reaching Activity in the Medial Posterior Parietal Cortex of Monkeys Is Modulated by Visual Feedback   Reaching and grasping an object is an action that we perform succesfully in light and in dark. In the dark, reaching movements rely on efferent copies of motor signals and proprioceptive reafferent signals from the moving limb. However, reaching in the light relies not only on efferent motor and reafferent proprioceptive signals but also on visual information about the target to be reached, the moving forelimb, and the surroundings. In the absence of visual feedback, movement performance quickly deteriorates .         Annalisa Bosco(1), Rossella Breveglieri(1), Eris Chinellato(2),     Claudio Galletti(1), Patrizia Fattori(1),     University of Bologna (1)     Department of Psychology     Universitat Jaume I de Castellon (2)     Department of Engineering and Computer Science
		15 Dec 2010 - A Tendon Driven Robot Eye Prototype   The MACEYE-II is a bio-inspired stereo-vision robot with the mechanics and motion characteristics of a human eye. This prototype of a robot eye must emulate the mechanical structure and the motions of a human eye with a comparable working range. The inspiration for the design obviously came from the study of the anatomy of the eye in humans and primates.         G. Cannata, A. Trabucco     Department of Communication, Computer and System Science (DIST)     University of Genoa
		07 May 2010 - Visual feature extraction in foveated systems   The log-polar imaging is a well established paradigm for simplifying a wide number of computational problems in active vision, since simultaneously provides a wide field-of-view, high spatial resolution on the fovea, and a significant data reduction. These features are well suitable for visual systems that continuously interact with the environment, by purposefully moving the eyes to bring the interesting objects into the foveas.         M. Chessa, S.P. Sabatini, F. Solari     Department of Biophysical and Electronic Engineering (DIBE)     University of Genoa
		26 April 2010 - Visuomotor spatial awareness through concurrent reach/gaze actions   The execution of gazing and reaching movements toward the same target is the fundamental building block for learning to coordinate the processing of visual information with body motor control in natural and artificial agents. Taking inspiration from human and primate studies, we developed a computational framework that allows an artificial agent to learn to interact with objects in its peripersonal space.         Eris Chinellato, Marco Antonelli, Beata Joanna Grzyb, Angel P. del Pobil     Robotic Intelligence Laboratory     Department of Engineering and Computer Science     Universitat Jaume I de Castellon (UJI)
		21 April 2010 - Covert shift of attention modulates the ongoing neural activity in a reaching area of the macaque dorsomedial visual stream  Posterior parietal area V6A is involved in shifting covert attention in space. The major results we achieved can be summarized as follows:  - neurons in the cortical pathway for reaching are influenced by spatial attention  - the attentional modulation occurs also without gaze shifts or visual stimulation  - visual, motor, and attentional responses can occur in combination in single neurons..         Claudio Galletti(1), Rossella Breveglieri(1), Markus Lappe(2), Annalisa Bosco(1),     Marco Ciavarro(1), Patrizia Fattori(1)     Department of Human and General Physiology     University of Bologna (1)     Department of Psychology     University of Münster (2)
		12 April 2010 - Saccadic adapation modifies perceptual localization  An experimental modification of the motor control of saccadic eye movements leads to an associated change in the perceived location of objects. The tight agreement between the amount of change of eye movement control and the amount of change of localization shows that perceptual space is shaped by motor knowledge rather than simply constructed from visual input.         Eckart Zimmermann, Markus Lappe     Department of Psychology     University of Münster, Germany
		8 May 2009 - Evidence for Peak-shaped Gaze Fields in Area V6A: Implications for Sensorimotor Transformations in Reaching Tasks  The majority of the gaze-related cells of the parietal area V6A of the macaque are non-linearly tuned. The use of non-linear, peak-shaped gaze fields improves the efficiency of the coding scheme of the position of reaching targets, expecially when a small number of units is avaliable.         Breveglieri, R.(1), Bosco, A.(1), Canessa, A.(2), Fattori, P.(1), Sabatini, S.P.(2)     Department of Human and General Physiology     University of Bologna (1)     Department of Biophysical and Electronic Engineering (DIBE)     University of Genoa (2)
		27 March 2009 - Learning receptive fields out of natural scenes with an biological motivated model of rate coded neurons  A model for learning receptive fields out of natural scenes. This model is based on biological motivated assumptions like attention and Hebbian learning and leads to receptive fields that are very similar to those measured by electrophysiological recordings.         F.H. Hamker, J. Wiltschut     Department of Psychology     University of Münster (Germany)
		24 March 2009 - Vergence simulator  The first version of the vergence simulator is ready. The simulator has been developed as a MATLAB-based platform for vergence control strategies development, modeling and testing. But it also can be used in wide spectrum of tasks, in which 3D modeling is involved, e.g. generation of the synthetic stereo images, computation of the ground truth optical flow, and disparity statistics estimation for the 3D scenes etc. Nikolay Chumerin Computational Neuroscience Research Group Laboratorium voor Neuro- en Psychofysiologie K.U.Leuven
		23 March 2009 - A Virtual Reality Simulator for Active Vision Systems  The novelty of the proposed approach is to use the Virtual Reality as a tool to simulate the behavior of physical systems, in particular of the visual system of a robot, rather than to make the perceptual rendering of the visual information exploitable by human users.         M. Chessa, S.P. Sabatini, F. Solari     Department of Biophysical and Electronic Engineering (DIBE)     University of Genoa
		03 March 2009 - Reading out Binocular Energy Population Codes for Short-latency Disparity-vergence Eye Movements  A model for the extraction of the vergence control signals, without computing the disparity map, is proposed. The model, based on a population of specialized disparity detectors, has been tested in vergence task on a plane moving in depth.         A. Gibaldi, M. Chessa, A. Canessa, S.P. Sabatini, F. Solari     Department of Biophysical and Electronic Engineering (DIBE)     University of Genoa