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Role of Ipsilateral Motor Cortex in Executing Movements With Increasing Demand on Precision (RIMC)

This study is ongoing, but not recruiting participants.
National Institutes of Health (NIH)
National Institute of Neurological Disorders and Stroke (NINDS)
Information provided by (Responsible Party):
Cathrin Buetefisch, Emory University Identifier:
First received: March 29, 2012
Last updated: December 15, 2016
Last verified: December 2016
It is well known that the motor area of one hemisphere of the brain (motor cortex) controls the movement of the opposite of the body. However, it is not clear whether as the movement becomes more complicated, the motor cortex of both hemispheres of the brain are involved. Currently the role of the motor cortex on the same side of the body (referred to as ipsilateral motor cortex) in hand performance remains controversial. The investigators demonstrated previously in healthy subjects that transiently lowering the activity of ipsilateral motor cortex improved the performance of the opposite hand. What is not know are the mechanisms involved in these changes of behavior. Transcranial magnetic stimulation (TMS) is a device that allows the non- invasive stimulation of the brain. When brain is stimulated repetitively at a very low rate and low intensity for about 15 minutes, the stimulated brain area becomes less active. This effect lasts 10 minutes and is called a "transient artificial lesion" as it mimicks the effects of transiently interfering with the function of the stimulated brain area. In the present study the investigators will conduct experiments using repetitive TMS to downregulate the activity of the motor area as in previous experiments and measures its effect on activity of motor cortex of both hemispheres. The investigators will study healthy subjects. It would be important to understand the effects in more detail for the design of treatment strategies in patients after stroke, which will be a topic of future studies.


Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: Enhancing Stroke Recovery Through Cortical Stimulation: The Role of the Ipsilateral Motor Cortex in Executing Movements With Increasing Demand on Precision

Further study details as provided by Cathrin Buetefisch, Emory University:

Primary Outcome Measures:
  • Define key parameters that contribute to contralesional M1 reorganization following stroke [ Time Frame: Up to six months post-stroke ]

Estimated Enrollment: 50
Study Start Date: May 2011
Estimated Study Completion Date: November 2017
Primary Completion Date: November 2016 (Final data collection date for primary outcome measure)
Stroke patients
Healthy Control


Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
30 Stroke patients with 15 in each group based on location of stroke 50 healthy volunteers

Inclusion Criteria for Stroke Patients:

  • Age 18-80
  • Single cerebral ischemic infarction one month prior to entering study
  • Affecting only one hemisphere as defined by MRI of the brain
  • At the time of cerebral infarct a motor deficit of hand of Medical Research Council Scale for Muscle Strength (MRC) of < 4- of wrist and finger extension/flexion movement
  • Fugl Meyer score > 27/66 (motor domain, upper extremity)
  • Ability to operate joystick at largest target level
  • No other neurological disorder
  • No intake of Central Nervous System (CNS) active drugs
  • Ability to give informed consent
  • Ability to meet criteria of inclusion experiment
  • No major cognitive impairment

Inclusion Criteria for Healthy Subjects:

  • Age 55-80 years with no neurological or psychiatric diseases
  • Normal neurological examination
  • Normal MRI of the brain
  • Normal neuropsychological testing
  • No intake of CNS active drugs that interfere with data collection
  • No contraindication to TMS
  • Ability to give informed consent
  Contacts and Locations
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Please refer to this study by its identifier: NCT01726218

United States, Georgia
Emory University School of Medicine
Atlanta, Georgia, United States, 30322
Sponsors and Collaborators
Cathrin Buetefisch
National Institutes of Health (NIH)
National Institute of Neurological Disorders and Stroke (NINDS)
Principal Investigator: Cathrin Buetefisch, MD, PhD Emory University
  More Information

Responsible Party: Cathrin Buetefisch, Dr Cathrin Buetefisch, M.D., PhD, Emory University Identifier: NCT01726218     History of Changes
Other Study ID Numbers: IRB00048694
R56NS070879-01 ( U.S. NIH Grant/Contract )
RIMCR56 ( Other Identifier: Other )
Study First Received: March 29, 2012
Last Updated: December 15, 2016

Keywords provided by Cathrin Buetefisch, Emory University:
Physical Medicine & Rehabilitation
Transcranial Magnetic Stimulation (TMS)

Additional relevant MeSH terms:
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases processed this record on September 21, 2017