Simultaneous measurement of human joint force, surface electromyograms, and functional MRI-measured brain activation

Functional magnetic resonance imaging (fMRI) has been increasingly used in studying human brain function given its non-invasive feature and good spatial resolution. However, difficulties in acquiring data from peripheral (e.g. information from muscle) during fMRI studies of motor function hinder int...

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Bibliographic Details
Published in:Journal of neuroscience methods 2000-08, Vol.101 (1), p.49-57
Main Authors: Liu, J.Z, Dai, T.H, Elster, T.H, Sahgal, V, Brown, R.W, Yue, G.H
Format: Article
Language:English
Subjects:
Biological and medical sciences
Brain function
Brain Mapping - methods
Calibration
Data acquisition
Electromyography
Equipment Design
Functional magnetic resonance imaging
Fundamental and applied biological sciences. Psychology
Hand - physiology
Hand Strength - physiology
Handgrip force
Humans
Magnetic Resonance Imaging
Miscellaneous
Motor Activity
Muscle Contraction - physiology
Online Systems
Pressure transducer
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Psychometrics. Statistics. Methodology
Psychomotor Performance - physiology
Shielding
Surface EMG
Transducers, Pressure
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Summary:Functional magnetic resonance imaging (fMRI) has been increasingly used in studying human brain function given its non-invasive feature and good spatial resolution. However, difficulties in acquiring data from peripheral (e.g. information from muscle) during fMRI studies of motor function hinder interpretation of fMRI data and designing more sophisticated investigations. Here we describe a system that was designed to concurrently measure handgrip force, surface electromyograms (EMG) of finger flexor and extensor muscles, and fMRI of human brain. The system included a pressure transducer built in a hydraulic environment, a heavily shielded EMG recording element, and a visual feedback structure for online monitoring of force and/or EMG signal, by the subject positioned in the scanner during an fMRI experiment. System evaluation and subsequent fMRI motor function studies have indicated that by using this system, high quality force and EMG signals can be recorded without sacrificing the quality of the fMRI data.
ISSN:0165-0270
1872-678X
DOI:10.1016/S0165-0270(00)00252-1