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Transfer of Grasp Control Across Hands After Stroke

NCT ID: NCT00589368

Last Updated: 2012-10-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

58 participants

Study Classification

OBSERVATIONAL

Study Start Date

2006-05-31

Study Completion Date

2012-05-31

Brief Summary

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The purpose of this study is to examine if the strong hand can assist in the recovery of muscle function in the weak hand after a stroke.

Detailed Description

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Hemiparesis is the most common motor impairment after stroke. Persistent deficits in the distal upper extremity lead to impaired hand function and disability in Activities of Daily Living, accruing enormous costs in terms of health care services and lost productivity. The mechanisms of recovery of hand motor function after stroke are poorly understood, and the protocols used in clinical practice lack a solid scientific rationale. Prior work has shown that grasping with the non-involved hand may assist in planning of grasp with the involved hand after stroke. The goal of the proposed project is to investigate the type and nature of information relayed across the hemispheres by prior manipulation with the non-involved hand to improve planning and control of grasp with the involved hand. Psychophysical methods using a grip instrument will be used to examine the type of information necessary for planning of grasp, and quantitative surface electromyography will be used to investigate the contribution of improved planning to neuromuscular control of grasp. Integration of these methods in the study of grasp control will clarify the neural mechanisms underlying hand dysfunction, and facilitate the development of rational therapeutic protocols for upper extremity rehabilitation after stroke.

Conditions

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Stroke With Hemiparesis

Keywords

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Brain Infarction pathology physiopathology psychology rehabilitation Fingers Grasp Functional Laterality Hand Strength Neuronal Plasticity Psychomotor Performance Biomechanis Touch Weight-Bearing

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

CROSS_SECTIONAL

Study Groups

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1

stroke group

Transfer of grasp control across hands

Intervention Type BEHAVIORAL

transfer of planning and execution of grasp across hands in terms of its effect on fingertip forces, and the timing and magnitude of muscle contraction in patients with hemiparesis and healthy controls

2

control group

Transfer of grasp control across hands

Intervention Type BEHAVIORAL

transfer of planning and execution of grasp across hands in terms of its effect on fingertip forces, and the timing and magnitude of muscle contraction in patients with hemiparesis and healthy controls

Interventions

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Transfer of grasp control across hands

transfer of planning and execution of grasp across hands in terms of its effect on fingertip forces, and the timing and magnitude of muscle contraction in patients with hemiparesis and healthy controls

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

1. Previously right-handed subjects with hemiparesis and complaints of unilateral hand dysfunction during grasping resulting from a single unilateral cerebral infarct in the MCA territory affecting either the right or the left side of the brain at least 3 months prior to data collection
2. Previously right-handed healthy control subjects age-matched to the stroke patients
3. All subjects must have the ability to reach, grasp and lift the test object with both extremities (stroke patients with the impaired extremity as well) and complete the experimental protocol as assessed by the PI.
4. All subjects must score \> 24 on the Folstein's mini-mental exam to screen out significant cognitive dysfunction
5. Subjects must obtain MRI or CT scan images of their brain taken since their stroke, or be willing to have a structural MRI or CT scan taken as part of this research study.

Exclusion Criteria

1. Presence of clinically significant visual deficits, aphasia, neglect, or apraxia as determined by clinical neurologic examination that may interfere with the research protocol
2. Presence of sensory deficits in control subjects and in the non-involved hand of stroke subjects on testing of two-point discrimination
3. History of surgery or other significant injury to the upper extremities
4. Botulinum toxin injections in the upper extremity musculature in the three months prior to enrollment in the study.
5. Current treatment with intrathecal baclofen
6. Previous neurological illness such as head trauma, prior stroke, epilepsy, demyelinating disease
7. Complicating medical problems such as uncontrolled, diabetes with polyneuropathy, severe renal, cardiac or pulmonary disease, or any other severe concurrent medical problem that will interfere with obtaining reliable results.
Minimum Eligible Age

21 Years

Maximum Eligible Age

90 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

NIH

Sponsor Role collaborator

NYU Langone Health

OTHER

Sponsor Role lead

Responsible Party

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Preeti Raghavan

Assistant Professor of Rehabilitation Medicine

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Preeti Raghavan, MD

Role: PRINCIPAL_INVESTIGATOR

NYU School of Medicine

Locations

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Rusk Institute of Rehabilitation Medicine

New York, New York, United States

Site Status

Countries

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United States

Other Identifiers

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K23HD049472

Identifier Type: NIH

Identifier Source: secondary_id

View Link

04-0585

Identifier Type: -

Identifier Source: org_study_id