Retinal optic flow during natural locomotion
Fig 4
Head velocity and acceleration during locomotion.
Head velocity and head/chest/hips acceleration patterns of a single representative subject walking in the “Distant Fixation” condition (where they walk while maintaining fixation on a point far down their path). Each blue trace is the velocity or acceleration trace for a single step, normalized for the time period from heel-strike to the subsequent heel-strike. Acceleration traces derive from the triaxal accelerometers of the subjects’ IMU sensors, while velocity traces are derived from numerical integration of these signals. The white line shows the mean and the shaded region is +/- 1 standard deviation. Right and Left steps were computed separately for the Medial/Lateral data, and are shown in red and cyan respectively. The vertical solid lines show mean toe-off time, with the vertical dashed lines showing +/- 1 standard deviation.