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Coordination of head and trunk accelerations during walking
J J Kavanagh1, S Morrison, R S Barrett
1School of Physiotherapy and Exercise Science, Griffith University, Gold Coast, QLD, Australia. J.Kavanagh@griffith.edu.au
European Journal of Applied Physiology
|April 14, 2005
Summary
Head movements are smoother and more controlled than trunk movements during walking. This study analyzed head and trunk accelerations to understand their oscillatory dynamics and coupling during gait.
Area of Science:
- Biomechanics
- Human Movement Analysis
- Gait Dynamics
Background:
- Understanding head and trunk coordination is crucial for analyzing human locomotion.
- Previous research has explored segment interactions during walking, but detailed oscillatory dynamics require further investigation.
Purpose of the Study:
- To investigate the relationship between head and trunk oscillatory dynamics across different planes of motion during walking.
- To quantify differences in acceleration patterns and inter-segment coupling between the head and trunk.
Main Methods:
- Ten healthy subjects walked at a preferred velocity on a 20m walkway.
- Tri-axial accelerometers measured head and trunk accelerations in vertical (VT), anterior-posterior (AP), and mediolateral (ML) directions.
- Data analyzed using power spectral, harmonic, and regularity measures.
Main Results:
- Head oscillations were smoother and had more low-frequency power than trunk oscillations.
- Differences in power spectral properties were most distinct in the mediolateral (ML) direction.
- Head exhibited greater coupling between VT-AP, VT-ML, and AP-ML accelerations compared to the trunk.
Conclusions:
- Head accelerations are significantly attenuated and more tightly controlled than trunk accelerations during walking.
- This head motion control is particularly evident in the mediolateral direction, highlighting a distinct stabilization strategy.