Mohamed Boutaayamou

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An original signal processing algorithm is presented to automatically extract, on a stride-by-stride basis, four consecutive fundamental events of walking, heel strike (HS), toe strike (TS), heel-off (HO), and toe-off (TO), from wireless accelerometers applied to the right and left foot. First, the signals recorded from heel and toe three-axis(More)
OBJECTIVE Gait disturbances like shuffling and short steps are obvious at visual observation in patients with advanced Parkinson's disease (PD). However, quantitative methods are increasingly used to evaluate the wide range of gait abnormalities that may occur over the disease course. The goal of this study was to test the ability of a trunk accelerometer(More)
The numerical models describing the behaviour of electrostatically actuated microsystems often disregard fringing fields. However, taking the fringing fields into account is crucial for an accurate computation of the electrostatic forces. In this work, the finite element method is applied for modeling electrostatic actuators. The electrostatic force(More)
BACKGROUND Gait patterns of healthy aging are needed to allow a comparison with pathological situations. However, little data is available. OBJECTIVE To present gait pattern of healthy older specially selected to be "healthy walkers". METHOD Fifty-seven older people benefited from a geriatric assessment including clinical and functional evaluations to(More)
In our aging society, gait disturbance becomes a major concern as it inevitably leads to limitations in mobility and to an increased risk of falls. Spontaneous walking speed normally decreases by about 1% per year from age 60 onward [1]. A population-based study has shown a 35% prevalence of gait disorders among persons over age 70 [2], and some abnormal(More)
Objective: Gait disturbances like shuffling and short steps are obvious at visual observation in patients with advanced Parkinson's disease (PD). However, quantitative methods are increasingly used to evaluate the wide range of gait abnormalities that may occur over the disease course. The goal of this study was to test the ability of a trunk accelerometer(More)
A new signal processing algorithm is developed for quantifying heel strike (HS) and toe-off (TO) event times solely from measured heel and toe coordinates during overground walking. It is based on a rough estimation of relevant local 3D position signals. An original piecewise linear fitting method is applied to these local signals to accurately identify HS(More)