Potentiation of Procedural Motor Learning in Health and Disease

NCT ID: NCT00126087

Last Updated: 2013-01-21

Basic Information

• Recruitment Status: TERMINATED
• Clinical Phase: PHASE4
• Total Enrollment: 18 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2005-07-31
• Study Completion Date: 2013-01-31

Brief Summary

The investigators plan to improve the learning of motor skills by pharmacological means (dopamine), and by noninvasive brain stimulation. They will study both healthy subjects and chronic stroke patients. In addition, they want to study the mechanisms of enhanced learning, on the molecular and the systems level.

Detailed Description

Adaptive behavior requires procedural motor learning, i.e. the acquisition of motor skills. Procedural learning is particularly critical in the rehabilitation of chronic motor deficits after stroke. A potent modulator of motor function and learning is found in the endogenous dopaminergic system. The investigator's own work could demonstrate that formation of an elementary motor memory, which constitutes the first step in acquiring more complex motor skills, can be enhanced in both healthy subjects and chronic stroke patients by pre-medication with levodopa. The aim of the present proposal is to:

• expand these exciting findings to procedural motor learning;
• explore the interaction with age, brain lesions, add-on interventions such as transcranial direct current stimulation (tDCS); and
• illuminate the underlying mechanisms.

The effect of levodopa +/- tDCS on procedural motor learning and cortical excitability will be studied in healthy volunteers and stroke patients. Then the investigator plans to delineate the underlying mechanisms of this effect by exploring N-methyl-D-asparate (NMDA) receptor-dependency of levodopa-enhanced learning and changes in activation and connectivity (using functional magnetic resonance imaging) in the respective neural networks resulting from the interaction of learning and dopaminergic neuromodulation.

Conditions

Stroke

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: TREATMENT
• Blinding Strategy: DOUBLE

Interventions

dopamine

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

Healthy Volunteers:

• Normal neurological examination
• Mini Mental State Examination of > 27
• Right handedness

Stroke Patients:

• Cortical or subcortical stroke with an initial severe hemiparesis Medical Research Council (MRC) scale < 2 that has recovered to a degree that patients are able to perform the proposed task (in general > MRC 4.5, with low spasticity, work in progress on motor learning in stroke patients)
• At least 1 year post-stroke
• Mini Mental State Examination of > 27
• Right-handedness

Exclusion Criteria

Healthy Volunteers and Stroke Patients:

• No antipsychotic, antidepressant drugs, and drugs affecting the dopaminergic system.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University Hospital Muenster

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Agnes Flöel, MD

Role: PRINCIPAL_INVESTIGATOR

University of Münster, Department of Neurology, Germany

Locations

University of Münster, Department of Neurology

Münster, North Rhine-Westphalia, Germany

Countries

Germany

References

Floel A, Breitenstein C, Hummel F, Celnik P, Gingert C, Sawaki L, Knecht S, Cohen LG. Dopaminergic influences on formation of a motor memory. Ann Neurol. 2005 Jul;58(1):121-30. doi: 10.1002/ana.20536.

Reference Type: BACKGROUND

PMID: 15984008 (View on PubMed)

Rosser N, Heuschmann P, Wersching H, Breitenstein C, Knecht S, Floel A. Levodopa improves procedural motor learning in chronic stroke patients. Arch Phys Med Rehabil. 2008 Sep;89(9):1633-41. doi: 10.1016/j.apmr.2008.02.030.

Reference Type: RESULT

PMID: 18760148 (View on PubMed)

Other Identifiers

Motor-Neuromod_01

Identifier Type: -

Identifier Source: org_study_id