Accessory hardware for neuromuscular measurements during functional MRI experiments.

Area of Science:

• Neuroscience
• Biomedical Engineering
• Human Sensorimotor Function

Background:

• Functional magnetic resonance imaging (fMRI) is a key tool for studying human sensorimotor function.
• Simultaneous acquisition of peripheral neuromuscular data (joint force, electromyograms [EMG]) with fMRI is limited.
• Lack of concurrent muscle output data impedes fMRI data interpretation and advanced experimental design.

Purpose of the Study:

• To develop and evaluate a data-acquisition system for simultaneous recording of force and EMG with fMRI.
• To enable more sophisticated investigations into human motor control.
• To overcome limitations in current fMRI research methodology for sensorimotor studies.

Main Methods:

• Integrated a hydraulic, pressure transducer-based force measurement device.
• Utilized a well-shielded EMG-recording apparatus.
• Developed a visual feedback setup, all connected to a laptop with data acquisition hardware and software.

Main Results:

• Demonstrated no significant mutual interference between the MRI environment and the force-EMG system.
• Confirmed the system's ability to record relatively noise-free force and EMG signals.
• Maintained the quality of fMRI data during simultaneous recordings.

Conclusions:

• The developed system successfully records force and EMG data concurrently with fMRI signals.
• This integrated system facilitates the study of human motor control, including precision tasks like handgrip and finger pinch.
• The equipment enhances fMRI investigations of human sensorimotor function.