Mechanical actions of individual muscles at the knee joint with varus/valgus malalignment

Author

Kahn, L. ; Zhang, L. ; Portland, G.

Author_Institution

Sensory Motor Performance Program, Rehabilitation Inst. of Chicago, IL, USA

Volume

1

fYear

1999

fDate

1999

Abstract

The mechanical actions of individual muscles crossing the knee joint were studied in the frontal plane. Through electrical stimulation, individual knee muscles were selectively activated and the resulting three-dimensional torques at the joint were measured. The isometric experiment was repeated at neutral, 5° varus, 5° valgus positions in the frontal plane and full knee extension to examine the effect of varus/valgus alignment on the muscle actions. In all muscles studied, the varus and valgus malalignment caused the muscles to exert a considerably larger torque in the direction opposite to that of the malalignment

Keywords

biomechanics; muscle; orthopaedics; torque; direction of rotation; distal femur; electrical stimulation; frontal plane; full knee extension; individual muscles; isometric experiment; knee joint muscles; mechanical actions; three-dimensional torques; twitch moments; varus/valgus malalignment; Biomedical engineering; Biomedical measurements; Electric variables measurement; Electrical stimulation; Force sensors; Knee; Leg; Muscles; Stability; Surgery;

fLanguage

English

Publisher

ieee

Conference_Titel

[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint

Conference_Location

Atlanta, GA

ISSN

1094-687X

Print_ISBN

0-7803-5674-8

Type

conf

DOI

10.1109/IEMBS.1999.802633

Filename

802633