Fig 1.
Acceleration (m/s2) of the right vestibular organ during walking for a representative participant.
0% and 100% of gait cycle both represent heel contact of the left foot, while 50% of gait cycle represents the approximate time of heel contact of the right foot. Six complete gait cycles are displayed.
Fig 2.
Accelerations (m/s2) of the right (thick solid line) and left (thin line) vestibular organs during a selected walking stride for a representative participant.
This figure illustrates the subtle differences in accelerations measured between right and left vestibular organs.
Fig 3.
Head acceleration when (a) slipping (black line) and walking (gray line), and (b) tripping (black line) and walking (gray line) for a representative participant. The instant of slip and trip onset is denoted by an arrow. Head acceleration during walking is shown from left heel contact to left heel contact, and head acceleration during slipping and tripping are shown from heel contact of non-perturbed foot before perturbation (left for all participants) to subsequent heel contact of non-perturbed foot (left for all participants).
Fig 4.
Peak head acceleration after slip onset (light grey) and heel contact during walking (white).
The top of each column and the positive error bar indicates the median value and 75% percentile, respectively, in the positive direction (anterior, right, and inferior). The bottom of each column and the negative error bar indicates the median value and 75% percentile, respectively, in the negative direction (posterior, left, and superior). * denotes significant difference between slipping and walking within the time interval (p<0.05).
Table 1.
Peak head acceleration after slip onset and heel contact during walking.
Fig 5.
Peak head acceleration after trip onset (dark grey) and mid-swing during walking (white).
The top of each column and positive error bar indicates the median value and 75% percentile, respectively, in the positive direction (anterior, right, and inferior). The bottom of each column and negative error bar indicates the median value and 75% percentile, respectively, in the negative direction (posterior, left, and superior). * denotes significant difference between tripping and walking within the time interval (p<0.05). # denotes a significant main effect of condition across all time intervals (p<0.001).
Table 2.
Peak head acceleration after trip onset and heel contact during walking.