Related Experiment Videos
Tuning of a basic coordination pattern constructs straight-ahead and curved walking in humans
Grégoire Courtine1, Marco Schieppati
1Sezione di Fisiologia Umana, Dipartimento di Medicina Sperimentale, Università di Pavia, and Centro Studi Attività Motorie, Fondazione Salvatore Maugeri (Istituto di Ricovero e Cura a Carattere Scientifico), Istituto Scientifico di Pavia, Pavia, Italy.
Journal of Neurophysiology
|December 12, 2003
Summary
Common principles govern human walking, whether straight or curved. Limb-specific adaptations in coordination patterns allow for seamless turns, indicating invariant underlying neural control for locomotion.
Area of Science:
- Biomechanics
- Neuroscience
- Human Locomotion
Background:
- Locomotion involves complex coordination of multiple body segments.
- Understanding the principles governing both straight and curved walking is crucial for gait analysis and rehabilitation.
Purpose of the Study:
- To test the hypothesis that common principles govern straight-ahead and curved walking.
- To uncover the spatiotemporal structure of lower limb coordination during different walking conditions.
Main Methods:
- Whole body movement recordings were analyzed.
- Principal Component Analysis (PCA) was applied to kinematic data of limb segments and trunk (13 degrees of freedom).
- Data included straight-ahead and curved walking, with and without vision.
Main Results:
- A single kinematic law explained lower limb coordination in both straight and curved walking.
- Curved walking involved limb-specific adaptive tuning of coordination patterns.
- Both walking types were low-dimensional (3 principal components explained >90% variance) with invariant coordination patterns.
- Absence of vision did not significantly affect intersegmental coordination.
Conclusions:
- Invariant kinematic laws, likely from spinal neural networks and mechanical oscillators, underlie both straight-ahead and curved walking.
- Descending commands tune spinal networks to adapt gait parameters for turning.
- Limb-specific tuning of coordination patterns enables adaptation to turning direction.