Schenker, A.

Neuromuscular Model for Gait Pathology

The aim of this project was to obtain a pathological gait using a neuromuscular model. This is useful to have a better understanding of the diseases mechanism and as a tool for orthosis design control. Indeed we can play with the flexibility of the model to adjust the parameters accordingly to biology. The model is based on reflexes principle. The gait is decompose in three periods, each with its own set of reflexes: swing, stance and double stance. The reflexes can be positive or negative, force or length feedback on the muscles which are represented with a Hill type model. Each leg are composed of 7 muscles. We chose to focus on duchenne dystrophy and stroke patients for pathology modeling. In a second time we tried to correlate the gait pattern to the data of a muscular dystrophy patient. We succeed to obtain different kind of gait using the hand tuning of the model parameters. Some of the gait characteristics of the pathology were reproduced, in particular for the stroke pathology. However due to the variability of the symptoms for this kind of diseases we need more investigation to personalized the model.