Publication

Hybrid Ultrasonic Motor and Electrorheological Clutch System for MR-Compatible Haptic Rendering

Publications associées (34)

Effects of early and intensive neuro-rehabilitative treatment on muscle synergies in acute post-stroke patients: a pilot study

Background: After a stroke, patients show significant modifications of neural control of movement, such as abnormal muscle co-activation, and reduced selectivity and modulation of muscle activity. Nonetheless, results reported in literature do not allow to ...

Biomed Central Ltd2013

Redundant information encoding in primary motor cortex during motor tasks

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Information encoded in neuron ensembles has previously been hypothesized to be highly redundant, despite the apparent inefficiency of a redundant encoding system. The recent availability of intracortical, multi-electrode recordings has enabled the possibil ...

IEEE2011

Joint action modulates motor system involvement during action observation in 3-year-olds

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When we are engaged in a joint action, we need to integrate our partner's actions with our own actions. Previous research has shown that in adults the involvement of one's own motor system is enhanced during observation of an action partner as compared to ...

2011

Altered modulation of intracortical excitability during movement preparation in Gilles de la Tourette syndrome

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Gilles de la Tourette syndrome is a neuropsychiatric disorder in which cortical disinhibition has been proposed as a pathophysiological mechanism involved in the generation of tics. Tics are typically reduced during task performance and concentration. How ...

Oxford University Press2010

Adaptive sensorimotor peripersonal space representation and motor learning for a humanoid robot

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This thesis presents possible computational mechanisms by which a humanoid robot can develop a coherent representation of the space within its reach (its peripersonal space), and use it to control its movements. Those mechanisms are inspired by current the ...

EPFL2009

A hybrid ultrasonic motor and electrorheological fluid clutch actuator for force-feedback in MRI/fMRI

Hannes Bleuler, Dominique Chapuis, Roger Gassert, Etienne Burdet

This paper presents a safe, electrically powered MR-compatible actuator with a large range of output impedance, which can be used at the entry of the scanner bore. This actuator is composed of an ultrasonic motor (USM) and a torque-controlled electrorheolo ...

2008

A Hybrid Ultrasonic Motor and Electrorheological Fluid Clutch Actuator for Force-Feedback in MRI/fMRI

Hannes Bleuler, Dominique Chapuis, Roger Gassert, Etienne Burdet

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

A Haptic Knob with a Hybrid Ultrasonic Motor and Powder Clutch Actuator

Hannes Bleuler, Dominique Chapuis, Etienne Burdet, Xavier Michel

In haptics, the forces to be displayed vary widely in terms of magnitude and bandwidth. A single actuator can hardly comply with these requirements. It has thus been proposed to combine electrical motors and passive devices in a hybrid actuator to cover a ...

2007

A 2-DOF fMRI Compatible Haptic Interface to Interact with Arm Movements

Hannes Bleuler, Dominique Chapuis, Roger Gassert, Etienne Burdet, Olivier Lambercy, Ludovic Dovat, Yves Ruffieux

This paper describes a two-degrees-of-freedom haptic interface to investigate the brain mechanisms of human motor control, which is capable of safely and gently interacting with human arm motion during functional magnetic resonance imaging (fMRI). A hydros ...

2006

MR-compatible robotics to investigate human motor control

Roger Gassert

Robotic interfaces can dynamically interact with humans performing movements and can be used to study neuromuscular adaptation. Such devices can produce computer controlled dynamics during movement and measure the interaction force and movement trajectory. ...

EPFL2006

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