Patent ID: 8876739

Claim:
A system for assessing onset and offset of turns by a moving subject to objectively quantify movement of the subject: (a) a plurality of wearable sensors operable to collect kinematics data obtained from the subject, wherein at least one sensor is configured to be located on a trunk of the subject and is operable to receive a trunk angle signal in a horizontal plane from the subject; and (b) a computing device operable to receive the kinematics data, wherein the computing device is further operable to describe the trunk angle signal using a continuous piecewise mathematical model, estimate coefficients of the continuous piecewise mathematical model using estimation methods, wherein the coefficients represent amplitude, time and duration of turns, fit the continuous piecewise mathematical model having estimated coefficients to the kinematics data received using numerical optimization to create a fit continuous piecewise mathematical model; and determine onset and offset of turns of the subject from the fit continuous piecewise mathematical model.