Primary motor cortical activity during unimanual movements with increasing demand on precision

Author:

Barany Deborah A.1ORCID,Revill Kate Pirog2,Caliban Alexandra1,Vernon Isabelle1,Shukla Ashwin1,Sathian K.34ORCID,Buetefisch Cathrin M.156

Affiliation:

1. Department of Neurology, Emory University, Atlanta, Georgia

2. Department of Psychology, Emory University, Atlanta, Georgia

3. Departments of Neurology and Neural & Behavioral Sciences, Milton S. Hershey Medical Center and Penn State College of Medicine, Hershey, Pennsylvania

4. Department of Psychology, College of Liberal Arts, The Pennsylvania State University, University Park, Pennsylvania

5. Department of Rehabilitation Medicine, Emory University, Atlanta, Georgia

6. Department of Radiology, Emory University, Atlanta, Georgia

Abstract

Contralateral primary motor cortex (M1) predominantly controls unilateral hand movements, but the role of ipsilateral M1 is unclear. We used functional magnetic resonance imaging (fMRI) to investigate how M1 activity is modulated by unimanual movements at different levels of demand on precision. Our results show that task characteristics related to demand on precision influence bilateral M1 activity, suggesting that in addition to contralateral M1, ipsilateral M1 plays a key role in controlling hand movements to meet performance precision requirements.

Funder

HHS | NIH | National Institute of Neurological Disorders and Stroke

HHS | NIH | National Institute of Child Health and Human Development

American Heart Association

Publisher

American Physiological Society

Subject

Physiology,General Neuroscience

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