Kinematic deferminants of human locomotion

N. A. Borghese, L. Bianchi, F. Lacquaniti

Research output: Contribution to journalArticle

268 Citations (Scopus)

Abstract

1. The aim of this study was to find kinematic patterns that are invariant across the normal range of locomotion speeds. Subjects walked at different, freely chosen speeds ranging from 0.9 to 2.1 m s-1, while motion and ground reaction forces on the right side of the body were recorded in three-dimensional space. 2. The time course of the anatomical angles of flexion-extension at the hip and ankle was variable not only across subjects, but even from trial to trial in the same subject. By contrast, the time course of the changes in the angles of elevation of each limb segment (pelvis, thigh, shank and foot) relative to the vertical was stereotyped across subjects. 3. To compare the waveforms across speeds, data were scaled in time relative to gait cycle duration. The pattern of ground reaction forces was highly speed dependent. Several distinct families of curves could be recognized in the flexion-extension angles at the hip and ankle. Instead, the waveforms of global length and elevation of the limb, elevation angles of all limb segments and flexion-extension at the knee were invariant with speed. 4. When gait trajectories at all speeds are plotted in the position space defined by the elevation angles of the limb segments, they describe regular loops on a plane. The statistical characteristics of these angular covariations were quantified by means of principal component analysis. The first two principal components accounted together for > 99% of the total experimental variance, and were quantitatively comparable in all subjects. 5. This constraint of planar covariation of the elevation angles is closely reminiscent of that previously described for the control of posture. The existence of laws of intersegmental co-ordination, common to the control of posture and locomotion, presumably assures the maintenance of dynamic equilibrium during forward progression, and the anticipatory adaptation to potentially destabilizing factors by means of co-ordinated kinematic synergies of the whole body.

Original languageEnglish
Pages (from-to)863-879
Number of pages17
JournalJournal of Physiology
Volume494
Issue number3
Publication statusPublished - Aug 1 1996

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Locomotion
Biomechanical Phenomena
Extremities
Posture
Gait
Ankle
Hip
Thigh
Principal Component Analysis
Pelvis
Foot
Knee
Reference Values
Maintenance

ASJC Scopus subject areas

  • Physiology

Cite this

Borghese, N. A., Bianchi, L., & Lacquaniti, F. (1996). Kinematic deferminants of human locomotion. Journal of Physiology, 494(3), 863-879.

Kinematic deferminants of human locomotion. / Borghese, N. A.; Bianchi, L.; Lacquaniti, F.

In: Journal of Physiology, Vol. 494, No. 3, 01.08.1996, p. 863-879.

Research output: Contribution to journalArticle

Borghese, NA, Bianchi, L & Lacquaniti, F 1996, 'Kinematic deferminants of human locomotion', Journal of Physiology, vol. 494, no. 3, pp. 863-879.
Borghese NA, Bianchi L, Lacquaniti F. Kinematic deferminants of human locomotion. Journal of Physiology. 1996 Aug 1;494(3):863-879.
Borghese, N. A. ; Bianchi, L. ; Lacquaniti, F. / Kinematic deferminants of human locomotion. In: Journal of Physiology. 1996 ; Vol. 494, No. 3. pp. 863-879.
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