TY - JOUR
T1 - A digit alignment device for kinematic analysis of the thumb and index finger
AU - Shen, Zhilei Liu
AU - Mondello, Tracy A.
AU - Nataraj, Raviraj
AU - Domalain, Mathieu F.
AU - Li, Zong Ming
PY - 2012/7
Y1 - 2012/7
N2 - Kinematic analysis of the digits using optical motion capture systems relies on defining accurate coordinate systems for the individual segments. Limitations of previous digit kinematic protocols include marker placement errors, marker occlusion and superimposition, and skin movement artifact. The purpose of this study was to develop a protocol utilizing a digit alignment device (DAD) and nail marker clusters to overcome these limitations. Ten subjects underwent 10 static calibration trials for validation. The orientation of the thumb distal phalange relative to the index finger distal phalange was described using Euler angles of pitch(x), yaw(y'), and roll(z''). The digit calibration protocol demonstrated high accuracy (0.5°, 1.9° and 2.2° for . x, . y', . z'') and precision (1.4°, 2.3° and 3.1° for . x, . y', . z''). The developed protocol provided convenient identification of transformations that determine anatomically relevant coordinate systems for the distal phalanges of the digits. The potential of utilizing this protocol as a standardized tool for digit kinematics was demonstrated using a dynamic task of precision pinching.
AB - Kinematic analysis of the digits using optical motion capture systems relies on defining accurate coordinate systems for the individual segments. Limitations of previous digit kinematic protocols include marker placement errors, marker occlusion and superimposition, and skin movement artifact. The purpose of this study was to develop a protocol utilizing a digit alignment device (DAD) and nail marker clusters to overcome these limitations. Ten subjects underwent 10 static calibration trials for validation. The orientation of the thumb distal phalange relative to the index finger distal phalange was described using Euler angles of pitch(x), yaw(y'), and roll(z''). The digit calibration protocol demonstrated high accuracy (0.5°, 1.9° and 2.2° for . x, . y', . z'') and precision (1.4°, 2.3° and 3.1° for . x, . y', . z''). The developed protocol provided convenient identification of transformations that determine anatomically relevant coordinate systems for the distal phalanges of the digits. The potential of utilizing this protocol as a standardized tool for digit kinematics was demonstrated using a dynamic task of precision pinching.
KW - Index finger
KW - Kinematic analysis
KW - Motion capture
KW - Precision pinch
KW - Thumb
UR - http://www.scopus.com/inward/record.url?scp=84864329563&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84864329563&partnerID=8YFLogxK
U2 - 10.1016/j.gaitpost.2012.04.012
DO - 10.1016/j.gaitpost.2012.04.012
M3 - Article
C2 - 22633016
AN - SCOPUS:84864329563
SN - 0966-6362
VL - 36
SP - 643
EP - 645
JO - Gait and Posture
JF - Gait and Posture
IS - 3
ER -