Med Biol Eng Comput - Gait analysis in children with cerebral palsy via inertial and magnetic sensors.

Tópicos

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Resumo

3D kinematic measurements in children with cerebral palsy (CP) to assess gait deviations can only be performed in gait laboratories using optoelectronic systems. Alternatively, an inertial and magnetic measurement system (IMMS) can be applied for ambulatory motion-tracking. A protocol named Outwalk has recently been developed to measure the 3D kinematics during gait with IMMS. This study preliminary validated the application of IMMS, based on the Outwalk protocol, in gait analysis of six children with CP and one typically developing child. Reference joint kinematics were simultaneously obtained from a laboratory-based system and protocol. On average, the root mean square error (RMSE) of Outwalk/IMMS, compared to the reference, was less than 17? in the transversal plane, and less than 10? in the sagittal and frontal planes. The greatest differences were found in offsets in the knee and ankle rotation, and in the hip flexion. These offset differences were mainly caused by a different anatomical calibration in the protocols. When removing the offsets, RMSE was always less than 4?. Therefore, IMMS is suitable for gait analysis of major joint angles in a laboratory-free setting. Further studies should focus on improvement of anatomical calibrations of IMMS that can be performed in children with CP.

Resumo Limpo

d kinemat measur children cerebr palsi cp assess gait deviat can perform gait laboratori use optoelectron system altern inerti magnet measur system imm can appli ambulatori motiontrack protocol name outwalk recent develop measur d kinemat gait imm studi preliminari valid applic imm base outwalk protocol gait analysi six children cp one typic develop child refer joint kinemat simultan obtain laboratorybas system protocol averag root mean squar error rmse outwalkimm compar refer less transvers plane less sagitt frontal plane greatest differ found offset knee ankl rotat hip flexion offset differ main caus differ anatom calibr protocol remov offset rmse alway less therefor imm suitabl gait analysi major joint angl laboratoryfre set studi focus improv anatom calibr imm can perform children cp

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