Article

In this paper we report on a novel algorithm for the real-time detection and
timing of initial (IC) and final contact (FC) gait events. We process the
vertical and antero-posterior accelerations registered at the lower trunk (L3
vertebra). The algorithm is based on a set of heuristic rules extracted from a
set of 1719 steps. An independent experiment was conducted to compare the results
of our algorithms with those obtained from a Digimax force platform. The results
show small deviations from times of occurrence of events recorded from the
platform (13+/-35 ms for IC and 9+/-54 ms for FC). Results for the FC timing are
especially relevant in this field, as no previous work has addressed its temporal
location through the processing of lower trunk accelerations. The delay in the
real-time detection of the IC is 117+/-39 ms and 34+/-72 ms for the FC, improving
previously reported results for real-time detection of events from lower trunk
accelerations.
CI - Copyright 2009 Elsevier B.V. All rights reserved.

Langue : ANGLAIS