NCT02017093

Error Enhancement of the Velocity Component

Error Enhancement of the Velocity Component in the Course of Stroke Patients' Reaching Movements - A Pilot Study

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 7 (actual)
• Sponsor: University of Haifa · Academic / Other
• Sex: All
• Age: 40 Years – 80 Years
• Healthy volunteers: Accepted

Summary

The purpose of this pilot study was to explore the impact of enhancement of the velocity component error in the course of reaching movements of the impaired/hemiparetic limb in an acute stroke subject. We hypothesized that the method would shift velocity profiles toward the optimal, resulting in a reduction in error. A prototype robot. This robotic device system has a two-dimensional motor, basic measurement capacities, and a robotic arm which is engaged to the subject's upper-limb in a sitting position. The enhancement of the velocity component error would shift velocity profiles toward the optimal, resulting in a reduction in error.

Detailed description

The wrist of the subject is connected to the robotic arm by a strip which supports the arm but allows free movements of the wrist. This configuration allows subjects with impaired grasping ability to use the system. A bio-feedback system enables the subject to perform various functional motor tasks that are presented on the screen in front of him. The system's sensors detect motor errors or deviations from an optimal/proper movement trajectory or velocity profile. Any deviation in direction, velocity, acceleration or necessary force from the optimal trajectory results in applied robotic forces that enhance such errors/deviations. The sensors and the applied forces all work and compute in real time, so that the force measurements and the applied force are updated to the executed movement.

Conditions

• Stroke
• Hemiparesis

Interventions

Type	Name	Description
DEVICE	Error Enhancement	Patients underwent upper extremity robotic training with the error enhancement effect. Training have focused on hand reaching movements in varity of directions and range of motions.
DEVICE	control treatment	Patients underwent upper extremity robotic training without the error enhancement effect. Training have focused on hand reaching movements in varity of directions and range of motions.

Timeline

• Start date: 2009-01-01
• Primary completion: 2012-07-01
• Completion: 2013-05-01
• First posted: 2013-12-20
• Last updated: 2016-01-13
• Results posted: 2016-01-13

Locations

1 site across 1 country: Israel