Markus Hauschild

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Lesions in human posterior parietal cortex can cause optic ataxia (OA), in which reaches but not saccades to visual objects are impaired, suggesting separate visuomotor pathways for the two effectors. In monkeys, one potentially crucial area for reach control is the parietal reach region (PRR), in which neurons respond preferentially during reach planning(More)
Cortical neural prosthetics extract command signals from the brain with the goal to restore function in paralyzed or amputated patients. Continuous control signals can be extracted from the motor cortical areas, whereas neural activity from posterior parietal cortex (PPC) can be used to decode cognitive variables related to the goals of movement. Because(More)
Neural prostheses for restoration of limb movement in paralyzed and amputee patients tend to be complex systems. Subjective intuition and trial-and-error approaches have been applied to the design and clinical fitting of simple systems with limited functionality. These approaches are time consuming, difficult to apply in larger scale, and not applicable to(More)
We have developed a virtual integration environment (VIE) for the development of neural prosthetic systems. The VIE is a software environment that modularizes the core functions of a neural prosthetic system--receiving signals, decoding signals and controlling a real or simulated device. Complete prosthetic systems can be quickly assembled by linking(More)
Building and testing novel prosthetic limbs and control algorithms for functional electrical stimulation (FES) is expensive and risky. Here, we describe a virtual reality environment (VRE) to facilitate and accelerate the development of novel systems. In the VRE, subjects/patients can operate a simulated limb to interact with virtual objects. Realistic(More)
Optic ataxia is a high-order deficit in reaching to visual goals that occurs with posterior parietal cortex (PPC) lesions. It is a component of Balint's syndrome that also includes attentional and gaze disorders. Aspects of optic ataxia are misreaching in the contralesional visual field, difficulty preshaping the hand for grasping, and an inability to(More)
Coordinated eye movements are crucial for precision control of our hands. A commonly believed neural mechanism underlying eye-hand coordination is interaction between the neural networks controlling each effector, exchanging, and matching information, such as movement target location and onset time. Alternatively, eye-hand coordination may result simply(More)
Steer-by-wire steering technology replaces the mechanical interface (steering column) between the driver and vehicle by a highly complex mechatronical system, consisting of computing units, sensors and actuators. A steer-by-wire system is basically a master-slave system: the driver come sponds to the operator, the vehicle to the environment, the(More)
[PDF] [Full Text] [Abstract] , September 17, 2014; 34 (38): 12884-12892. J. Neurosci. Eun Jung Hwang, Markus Hauschild, Melanie Wilke and Richard A. Andersen Hand Coordination Relies on the Parietal Reach Region − Spatial and Temporal Eye [PDF] [Full Text] [Abstract] , December 15, 2014; 112 (12): 3138-3153. J Neurophysiol Shubhodeep Chakrabarti, Pablo(More)