Location of the instantaneous center of rotation for shoulder motion

Author

Kumar, A. ; Jobe, C. ; Saha, S.

Author_Institution

Biomech. & Biomater. Lab., Loma Linda Univ., CA, USA

fYear

1995

fDate

7-9 Apr 1995

Firstpage

245

Lastpage

247

Abstract

Information regarding the instantaneous center of rotation for shoulder motion is important for the design of continuous passive motion (CPM) machines for the shoulders. In this study, we attempted to determine the locations of the instantaneous center of rotation for shoulder motion of the arm. Fourteen healthy adult subjects (age 18 to 30 years) participated in this study, five were females and the rest were males, The instantaneous center of rotation was computed for two different shoulder motions: (1) abduction motion in the sagittal plane and, (2) abduction motion in the coronal plane. The motion of the arm was monitored by a magnetic device (Polhemus). Our results showed that the location of the instantaneous center was much more proximal than the glenohumoral joint. It was located between 11 and 16 cm from the C₇ vertebra for the abduction in the coronal plane and this distance varied from 9 to 13 cm for the motion in sagittal plane

Keywords

biomechanics; bone; patient treatment; 11 to 16 cm; 18 to 30 year; 9 to 13 cm; C₇ vertebra; Polhemus; abduction motion; arm; continuous passive motion machines; coronal plane; females; glenohumoral joint; healthy adult subjects; instantaneous center of rotation location; magnetic device; males; rehabilitation device; sagittal plane; shoulder motion; shoulder surgery; Data acquisition; Fixtures; Joints; Laboratories; Magnetic confinement; Magnetic devices; Orthopedic surgery; Shoulder; Testing; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Biomedical Engineering Conference, 1995., Proceedings of the 1995 Fourteenth Southern

Conference_Location

Shreveport, LA

Print_ISBN

0-7803-2083-2

Type

conf

DOI

10.1109/SBEC.1995.514490

Filename

514490