TY - JOUR
T1 - A new anatomically based protocol for gait analysis in children
AU - Leardini, Alberto
AU - Sawacha, Zimi
AU - Paolini, Gabriele
AU - Ingrosso, Stefania
AU - Nativo, Roberto
AU - Benedetti, Maria Grazia
PY - 2007/10
Y1 - 2007/10
N2 - Human movement analysis still suffers from the weakness of the currently used protocols for data collection and reduction. Reliable data comparisons and precise functional assessment require anatomically based definitions of the reference axes and frames, and therefore careful identification and tracking of the landmarks. When impaired children are analysed, the marker-set and other measurement procedures have to be minimised to reduce the time of the experiment and ensure patient collaboration. A new protocol is proposed for the analysis of pelvis and lower limb motion obtained as a compromise between these two requirements. A marker-set is proposed which involves the attachment of 22 skin markers, the calibration by a pointer of 6 anatomical landmarks, and the identification of the hip joint centre by a prediction approach. Anatomical reference frames and joint rotations are defined according to current recommendations. The protocol was assessed by analysing a single child in several repetitions by different examiners, and a population of 10 healthy children, mean age 9.7-years-old. The entire analysis was repeated after subtraction of the offset by static posture angles. The minimum and maximum means of the standard deviations from five examiners of the same child were respectively 2.1° in pelvic obliquity and 6.8° in knee rotation. The minimum and maximum means of the standard deviations from the 10 healthy children were 2.1° in pelvic obliquity and 9.6° in knee internal-external rotation. The protocol is feasible and allows 3D anatomical-based measurements of segment and joint motion and data sharing according to current standards.
AB - Human movement analysis still suffers from the weakness of the currently used protocols for data collection and reduction. Reliable data comparisons and precise functional assessment require anatomically based definitions of the reference axes and frames, and therefore careful identification and tracking of the landmarks. When impaired children are analysed, the marker-set and other measurement procedures have to be minimised to reduce the time of the experiment and ensure patient collaboration. A new protocol is proposed for the analysis of pelvis and lower limb motion obtained as a compromise between these two requirements. A marker-set is proposed which involves the attachment of 22 skin markers, the calibration by a pointer of 6 anatomical landmarks, and the identification of the hip joint centre by a prediction approach. Anatomical reference frames and joint rotations are defined according to current recommendations. The protocol was assessed by analysing a single child in several repetitions by different examiners, and a population of 10 healthy children, mean age 9.7-years-old. The entire analysis was repeated after subtraction of the offset by static posture angles. The minimum and maximum means of the standard deviations from five examiners of the same child were respectively 2.1° in pelvic obliquity and 6.8° in knee rotation. The minimum and maximum means of the standard deviations from the 10 healthy children were 2.1° in pelvic obliquity and 9.6° in knee internal-external rotation. The protocol is feasible and allows 3D anatomical-based measurements of segment and joint motion and data sharing according to current standards.
KW - Anatomical reference frames
KW - Experimental methodology
KW - Human movement analysis
KW - Kinematic model
KW - Marker-set
KW - Offset angles
KW - Variability
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U2 - 10.1016/j.gaitpost.2006.12.018
DO - 10.1016/j.gaitpost.2006.12.018
M3 - Article
C2 - 17291764
AN - SCOPUS:34548775694
VL - 26
SP - 560
EP - 571
JO - Gait and Posture
JF - Gait and Posture
SN - 0966-6362
IS - 4
ER -