Open AccessEvaluation of a Bio-impedance Method for Measuring Human Arm Movement
Author(s) -
Jong Chan Kim,
Soo Chan Kim,
Ki Chang Nam,
Seon Hui Ahn,
Mig Park,
Deok Won Kim
Publication year - 2002
Publication title -
yonsei medical journal/yonsei medical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.702
H-Index - 63
eISSN - 1976-2437
pISSN - 0513-5796
DOI - 10.3349/ymj.2002.43.5.637
Subject(s) - wrist , elbow , forearm , electrical impedance , upper limb , elbow flexion , joint (building) , orthodontics , movement (music) , anatomy , physical medicine and rehabilitation , mathematics , medicine , biomedical engineering , acoustics , physics , structural engineering , engineering , quantum mechanics
This study proposes a new method for measuring upper limb movement using a bio-impedance technique. Bio-impedance and joint angle were simultaneously measured during the wrist and elbow movements of 12 normal subjects. The joint angles of the wrist and elbow were estimated by measuring the bio-impedances of the forearm and upper arm, respectively. Although the measured bio-impedances on upper limbs varied among individuals, changes in the bio-impedances and joint angles of the wrist and elbow during their extension and flexion were very highly correlated, having correlation coefficients of 0.96 +/- 0.04 and -0.98 +/- 0.02, respectively. The reproducibilities of wrist and elbow bio-impedance changes were 2.1 +/- 1.0% and 1.8 +/- 1.0%, respectively. Since the proposed method is not restricted by size or the duration of measurements, it is expected to be useful for the analysis of athletic movement.