Functional MRI cerebral activation and deactivation during finger movement

Jerry David Allison, K. J. Meador, D. W. Loring, Ramon E Figueroa Ortiz, J. C. Wright

Research output: Contribution to journalArticle

247 Citations (Scopus)

Abstract

Objective: To examine interhemispheric interactions of motor processes by using functional MRI (fMRI). Background: Despite evidence of interhemispheric inhibition from animal, clinical, and transcranial magnetic stimulation (TMS) studies, fMRI has not been used to explore activation and deactivation during unilateral motor tasks. fMRI changes associated with motor activity have traditionally been described by comparing cerebral activation during motor tasks relative to a 'resting state.' In addition to this standard comparison, we examined fMRI changes in the resting state relative to a motor task. Methods: Thirteen healthy volunteers performed self-paced sequential finger/thumb tapping for each hand. During fMRI data acquisition, four epochs were obtained; each comprised of 30 seconds of rest, 30 seconds of right hand activity, and 30 seconds of left hand activity. Resultant echoplanar images were spatially normalized and spatially and temporally smoothed. Results: As expected, hand movements produced activation in the contralateral sensorimotor cortex and adjacent subcortical regions and, when present, the ipsilateral cerebellum. However, hand movement also produced a significant deactivation (i.e., decreased blood flow) in the ipsilateral sensorimotor cortex and subcortical regions, and when present, the contralateral cerebellum. Conjunction analysis demonstrated regions that are activated by one hand and deactivated by the contralateral hand. Conclusion: Unilateral hand movements are associated with contralateral cerebral activation and ipsilateral cerebral deactivation, which we hypothesize result from transcallosal inhibition.

Original languageEnglish (US)
Pages (from-to)135-142
Number of pages8
JournalNeurology
Volume54
Issue number1
StatePublished - Jan 11 2000

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Fingers
Hand
Magnetic Resonance Imaging
Cerebellum
Transcranial Magnetic Stimulation
Thumb
Healthy Volunteers
Motor Activity

Keywords

  • Functional MRI
  • Inhibition
  • Motor
  • Physiology

ASJC Scopus subject areas

  • Clinical Neurology

Cite this

Functional MRI cerebral activation and deactivation during finger movement. / Allison, Jerry David; Meador, K. J.; Loring, D. W.; Figueroa Ortiz, Ramon E; Wright, J. C.

In: Neurology, Vol. 54, No. 1, 11.01.2000, p. 135-142.

Research output: Contribution to journalArticle

Allison, JD, Meador, KJ, Loring, DW, Figueroa Ortiz, RE & Wright, JC 2000, 'Functional MRI cerebral activation and deactivation during finger movement', Neurology, vol. 54, no. 1, pp. 135-142.
Allison, Jerry David ; Meador, K. J. ; Loring, D. W. ; Figueroa Ortiz, Ramon E ; Wright, J. C. / Functional MRI cerebral activation and deactivation during finger movement. In: Neurology. 2000 ; Vol. 54, No. 1. pp. 135-142.
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