Lower limb coordination and variability in children with spastic cerebral palsy during flat ground walking:a vec-tor coding technique study
CHEN Chuanyi
QI Liuxin
LI Aihua
NI Yan
SUN Wei
WANG Jiangna
Abstract：Objective To quantify the lower limb coordination and coordination variability of children with spastic cerebral palsy(CP)during flat ground walking using vector coding technology.
Methods From September to December,2023,eight children with spastic CP(patients)from Ji'nan Rehabilitation Hospi-tal and Ji'nan Special Education School,and eight healthy children(controls)from communities walked on a treadmill at a speed of 0.45 m/s.Lower limb kinematic data were collected using Vicon,a three-dimensional mo-tion capture system.Vector coding technology was used to quantify the temporal and spatial parameters of ipsilat-eral lower limb joints to calculate joint coupling angles and coupling angle variability(CAV).
Results In the first and second double support phase,the hip-knee coupling angle was significantly larger in the patients than in the controls(|t|>2.317,P<0.05).In the swing phase,the hip-ankle and knee-ankle coupling angles were significantly larger in the patients(|t|>2.346,P<0.05).In the first double support phase and the single support phase,CAV of the hip-knee and hip-ankle were significantly larger in the patients(|t|>2.454,P<0.05),and they were smaller in the swing phase(t>2.560,P<0.05).In the second double support phase and the swing phase,CAV of the knee-ankle was significantly larger in the patients(|t|>2.909,P<0.05).
Conclusion Coordination among hip,knee and ankle joints is poor for children with spastic CP during both the stance and swing phases of walking,and variability is more during the stance phase.
Keywords：spastic cerebral palsygaitcoordinationvector coding
Publication Date：2025-05-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 613-620 )