A system for the analysis of foot and ankle kinematics during gait

Author

Kidder, Steven M. ; Abuzzahab, Faruk S., Jr. ; Harris, Gerald F. ; Johnson, Jeffrey E.

Author_Institution

Dept. of Biomed. Eng., Marquette Univ., Milwaukee, WI, USA

Volume

4

Issue

1

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

25

Lastpage

32

Abstract

A five-camera Vicon (Oxford Metrics, Oxford, England) motion analysis system was used to acquire foot and ankle motion data. Static resolution and accuracy were computed as 0.86±0.13 mm and 98.9%, while dynamic resolution and accuracy were 0.1±0.89 and 99.4% (sagittal plane). Spectral analysis revealed high frequency noise and the need for a filter (6 Hz Butterworth low-pass) as used in similar clinical situations, A four-segment rigid body model of the foot and ankle was developed. The four rigid body foot model segments were (1) tibia and fibula, (2) calcaneus, talus, and navicular, (3) cuneiforms, cuboid, and metatarsals, and (4) hallux. The Euler method for describing relative foot and ankle segment orientation was utilized in order to maintain accuracy and ease of clinical application. Kinematic data from a single test subject are presented

Keywords

biomechanics; kinematics; medical image processing; motion estimation; physiological models; spectral analysis; 6 Hz; Butterworth low-pass filter; Euler method; ankle kinematics; ankle segment orientation; calcaneus; cuboid; cuneiforms; fibula; five-camera Vicon motion analysis system; foot kinematics; gait; hallux; high frequency noise; metatarsals; navicular; rigid body foot model segments; static resolution; talus; tibia; Filters; Foot; Frequency; Helium; Kinematics; Motion analysis; Orthopedic surgery; Spectral analysis; Testing; Tracking;

fLanguage

English

Journal_Title

Rehabilitation Engineering, IEEE Transactions on

Publisher

ieee

ISSN

1063-6528

Type

jour

DOI

10.1109/86.486054

Filename

486054