P023 Gait initiation analysis of a patient with Huntington's disease using wearable sensors for acceleration: a case study

Autor: Karim Leilnahari, S. Khorramymehr, B. Yasrebi
Rok vydání: 2008
Předmět:
Zdroj: Gait & Posture. 28:S63
ISSN: 0966-6362
DOI: 10.1016/s0966-6362(08)70092-4
Popis: s of the 17th Annual Meeting of ESMAC, Poster Presentations / Gait & Posture 28S (2008) S49–S118 S63 cases CTEV does not significantly affect the temporal parameters of gait. However mild foot drop, external hip rotation, internal foot progression and foot adduction are commonly presented [1]. The GGI [2] is a widely used single value measure of overall gait pathology, originally developed as a measure of cerebral palsy involvement. Previous work to validate the GGI indicated that pathologies other than cerebral palsy could be distinguished using their GGI [3]. The aim of this study was to show that the GGI could also be used to differentiate a CTEV patient population from an able bodied control population. Patients/Materials and Methods: All data was collected at the Ryegate Gait Laboratory, Sheffield, using a Vicon system (6 cameras working at 50Hz) and processed using Plug In Gait modelling software. The CTEV sample group consisted of 14 patients (six boys, eight girls) of mean age 11.0±3.4 years (5 to 17) with 23 affected limbs. Patients who had been previously fitted with Illizarov frames were not included in the CTEV study group, but all subjects had had some level of previous treatment in infancy to correct deformity. The control group consisted of 4 patients (8 limbs) selected from the Sheffield normal patient database. GGI calculations were made in Matlab using an internally developed programme, and subsequent statistical analysis was performed using Analyse-it for Microsoft Excel software (version 2.09). Results: Kolmogorov-Smirnov tests deemed the control and CTEV samples to be normally distributed, and an independent 2-tailed Students t test was used to calculate the mean GGI for each sample. With confidence level 95% the mean GGI for the control population is 34.4±9.2 and for the CTEV population 72.9±19.2. The difference between the two population means was shown to be statistically significant (p< 0.001). Figure 1. GGI (95% confidence) for control and CTEV populations. Discussion: The GGI is an easily understood measure of overall gait pathology that is routinely calculated for all patients who attend for gait analysis at the Ryegate Gait Laboratory. The study builds on previous work to demonstrate that the GGI, although initially developed for use as a measure of cerebral palsy involvement, is sensitive enough to distinguish between the gait of a population of patients affected by CTEV and that of an able-bodied population. This study could be developed by examining preand post-surgical data for CTEV patients who are recommended for surgery following gait analysis. There is also potential for using the Oxford Foot Model to obtain more kinematic information regarding the hindfoot and forefoot segments. References [1] Theologis TN, et al. J Bone Joint Surg [Br] 2003; 85-B: 572−7. [2] Schutte LM, et al. Gait Posture 2000; 11: 25−31. [3] Romei M, et al. Gait Posture 2004; 19: 85−90.
Databáze: OpenAIRE
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