CVA, Stroke, grasping, reaching, robotics, electrical stimulation, beroerte, reiken, grijpen, elektrostimulatie, robotica
Conditions
Interventions
Patients will receive different types of single and multichannel electrical stimulation with and without robotic assistance.
The electrical stimulation is applied by array electrodes. The stimulatio
Sponsors
University of Twente
Eligibility
Inclusion criteria
Inclusion criteria: 1. A history of a single unilateral stroke in the medial cerebral artery (MCA) region resulting in single-sided hemiparesis; 2. The onset of the stroke was more than six weeks ago; 3. The ability to voluntarily generate 20 degrees excursions in the plane of elevation (horizontal ab-/adduction) and elevation angle (ab-/adduction, ante-/retroflexion) of the shoulder joint; 4. The ability to voluntarily generate an excursion of 20 degrees of elbow flexion/extension; 5. The ability to voluntarily extend the wrist 10 degrees from neutral flexion/extension; 6. Adequate cognitive function to understand the experiments, follow instructions, and give feedback to the researchers.
Exclusion criteria
Exclusion criteria: 1. A fixed contracture deformity in the (affected) upper limb was present; 2. Pain as a limiting factor for the subject's active range of motion.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The main study parameter will be ARAT scores for the selected ARAT objects (10cm cube, 2,5 cm cube, 6mm ball bearing and 1,5 cm marble). The endpoint of the study is an effective control algorithm, which is able to assist stroke patients to successfully grasp these selected ARAT objects. | — |
Secondary
| Measure | Time frame |
|---|---|
| Target positions for all fingers are estimated on beforehand. These target positions are used to estimate kinematic movement errors of the hand, thumb and fingers during the grasping movements. This measure is used to evaluate the influence of different types of assistance on hand, thumb and finger movement. In addition, the effect of electrical stimulation in healthy and stroke patients will be compared. During T1 and T2 forces at the target position are measured and compared to target forces needed to lift the specific ARAT objects. This measure is also used to evaluate the influence of different types of assistance on hand, thumb and finger movement. During T2 the amount of flexor activity during hand opening/closing will be measured by EMG, to assess the amount of enlarged flexor activity in the patient group, with should be counteracted by the stimulation algorithms. | — |
Contacts
Public ContactArd Westerveld
P.O. Box 217
Outcome results
None listed