Brain Control of Bimanual (Both Hands) Movements

Brain Areas Involved in Temporal Linkage of Bilateral Movements

This study will use magnetic resonance imaging (MRI) to investigate how the brain controls bimanual movements (movements of both hands).

Healthy normal volunteers between 21 and 65 years of age may be eligible for this study.

Participants will have a medical history, physical and neurological examinations, and will complete a questionnaire before and after testing. The study consists of two parts: 1) finger movement training and 2) magnetic resonance imaging, as follows:

Part 1 - Finger movement training

Participants will train to do three different finger movements using the index finger of both hands. The fingers will be taped to a device that measures their movement. The movements are:

• Lifting and dropping the index fingers of each hand repetitively and in synchrony (starting and stopping at the same time). The amplitude of finger movements is the same for both hands.
• Lifting and dropping the index fingers of each hand repetitively and in synchrony, but with a different amplitude for each hand.
• Lifting and dropping of the index finger of each hand repetitively, but each with a different amplitude and not in synchrony.

Part 2 - Magnetic resonance imaging

Participants will perform the trained movements during MRI scanning. This diagnostic procedure uses a magnetic field and radio waves to produce images of brain structure and activity. For MRI, the subject lies on a stretcher that is moved into the scanner-a cylinder containing a strong magnet. Earplugs are worn to protect the ears from loud thumping noises that occur with electrical switching of radio frequency circuits. Scanning time varies from 20 minutes to 2 hours, with most examinations lasting 1 to 1 1/2 hours. The subject can communicate with the staff person conducting the test at all times during the scan.

Study Overview

• Status: Completed
• Conditions: Healthy

Detailed Description

OBJECTIVE: The present study is aimed to clarify which structure or network of structures are responsible for the temporal linkage in bimanual co-ordination in healthy humans.

STUDY POPULATION: Healthy normal volunteers.

DESIGN:

fMRI: Anatomical MRI and fMRI sequences are performed to obtain blood-oxygenation level-dependent (BOLD) imaging of brain activation during which movement performance will be measured with respect to movement synchrony, movement speed and amplitude.

Multi-channel EEG recording performed while motor performance is monitored.

OUTCOME MEASURES:

fMRI: BOLD will be obtained using baseline correction.

EEG: band-power and inter-regional coherence will be calculated using baseline correction.

• Study Type: Observational
• Enrollment: 40

Contacts and Locations

Study Locations

• United States
  • Maryland
    • Bethesda, Maryland, United States, 20892
      • National Institutes of Health Clinical Center, 9000 Rockville Pike

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 21 years to 75 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

• INCLUSION CRITERIA:

  1. Forty normal volunteers ranging from 21 to 75 will be included. Normal volunteers would be recruited from people who are registered as HMCS Normal Volunteers. All subjects should have a valid Clinical Center Medical Record Number.
  2. Alcohol abstention is required for all subjects for both fMRI and EEG for 24 hours before the study.

EXCLUSION CRITERIA:

1. Normal subjects younger than 21 years and older than 75 will also be excluded from the study since development and decline in movement performance and the associated brain activation is out of the scope of the present study.
2. Normal subjects with MRI findings consistent with organic brain lesions such as brain tumors, stroke, trauma or AVMs will be excluded.
3. Normal subjects with a history of significant medical disorders such as cancers, or requiring continuous treatment with drugs will be excluded.
4. Subjects with mental disorders will be excluded.
5. We will not scan pregnant women because safety of high magnetic field to fetus is not established. Therefore, we will administer a urine pregnancy test for any female subjects of childbearing potential 24 hours prior to functional MRI scan. Pregnant women will not be excluded from the EEG arm of this protocol.

Study Plan

How is the study designed?

Collaborators and Investigators

• Sponsor: National Institute of Neurological Disorders and Stroke (NINDS)

Publications and helpful links

General Publications

• Andres FG, Mima T, Schulman AE, Dichgans J, Hallett M, Gerloff C. Functional coupling of human cortical sensorimotor areas during bimanual skill acquisition. Brain. 1999 May;122 ( Pt 5):855-70. doi: 10.1093/brain/122.5.855.
• Ahissar E, Sosnik R, Haidarliu S. Transformation from temporal to rate coding in a somatosensory thalamocortical pathway. Nature. 2000 Jul 20;406(6793):302-6. doi: 10.1038/35018568.
• Brinkman J, Kuypers HG. Splitbrain monkeys: cerebral control of ipsilateral and contralateral arm, hand, and finger movements. Science. 1972 May 5;176(4034):536-9. doi: 10.1126/science.176.4034.536.

Study record dates

Study Major Dates

• Study Start: December 10, 2001
• Study Completion: December 24, 2008

Study Registration Dates

• First Submitted: January 9, 2002
• First Submitted That Met QC Criteria: January 9, 2002
• First Posted (Estimate): January 10, 2002

Study Record Updates

• Last Update Posted (Actual): July 2, 2017
• Last Update Submitted That Met QC Criteria: June 30, 2017
• Last Verified: December 24, 2008

More Information

Terms related to this study

• Keywords: HV; Healthy Volunteer; fMRI; Normal Control; Voluntary Movement
• Other Study ID Numbers: 020069; 02-N-0069