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Investigating muscle coordination patterns with Granger causality analysis in protrusive motion from tagged and
Hyeonjeong Park1, Fangxu Xing1, Maureen Stone2
1Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA.
JASA Express Letters
|September 6, 2024
Summary
This study reveals sequential muscle coordination during human tongue protrusion. Understanding these tongue muscle movements is key for advancing biomechanics and speech research.
Area of Science:
- Biomechanics
- Human Anatomy
- Neuromuscular Control
Background:
- The human tongue comprises intrinsic muscles enabling complex movements.
- Understanding tongue muscle coordination is vital for speech and swallowing research.
Purpose of the Study:
- To investigate muscle coordination patterns during tongue protrusive motion.
- To analyze the roles of five key muscles in tongue protrusion.
Main Methods:
- Acquisition of tagged and diffusion MRI data for muscle fiber analysis.
- Derivation of Lagrangian strain measurements.
- Application of Granger causal analysis to assess muscle interdependencies.
Main Results:
- Identified distinct muscle fiber geometry and motion patterns.
- Demonstrated predictive information flow among tongue muscles.
- Experimental data suggest sequential activation of muscle groups during protrusion.
Conclusions:
- Tongue protrusive motion is orchestrated by sequential muscle coordination.
- This research provides insights into the biomechanical control of tongue function.
- Findings contribute to a deeper understanding of oromotor control mechanisms.
