KINEMAGICS dataset : 3D gait kinematics of asymptomatic individuals and patients with heterogenous gait disorders from IMU and optoelectronic systems

Dataset description This dataset gathers lower-limb kinematic outcomes computed from two synchronous motion capture systems: an optoelectronic system and an IMU-based system; from 2 independant operators. Fifty-five participants were included: asymptomatic individuals (n = 15), patients with cerebral palsy (n = 15), and individuals with other motor disorders (n = 25). All participants were simultaneously measured by a 7-IMUs (Physilog5, GaitUp, Renens) inertial system at 256 Hz and a twelve-camera (Oqus7+) optoelectronic system (Qualisys, Göteborg, Sweden) at 100 Hz. The IMUs were positioned on the lower back (at sacrum level, in the middle and below the posterior superior iliac spines), the thighs (on the frontal side), the shanks (on the distal lateral side) and the feet (on the top). Tridimensional acceleration and angular velocity were acquired with ranges of ±16g and ±2000°/s respectively. Reflective markers were placed according to the Conventional Gait Model 2.4 (CGM 2.4) (Leboeuf et al., 2019) (DOI: 10.1016/j.gaitpost.2019.04.015) on the lower limbs. For the first session, the protocol was led by one operator (A). For the second session, the protocol was led first by one operator (A) and then, after equipment removal and 15 minutes rest, the protocol was repeated and led by another operator (B). Kinematics computation from IMUs was performed as described in Carcreff et al. (2022) (DOI:10.3390/s22155657). Kinematics data was cut into gait cycles, using the events detected on the raw inertial data as proposed by Mariani et al. (2012) (DOI: 10.1109/TBME.2012.2227317) for the IMU data. The reference kinematic data was computed using the CGM 1.1 (Leboeuf et al. (2019) (DOI: 10.1016/j.gaitpost.2019.04.015). All kinematic variables were computed per gait cycle and are provided for each joint, plane of motion, body side, and measurement device. Variable description PAT: patient identification number GROUP: group identification C: cerebral palsy O: other motor disorders H: healthy or asymptomatic individuals AGE: age group identification A: adults (> 18 years old) Y: teenagers (14–17 years old) C: children (5–13 years old) VIS: visit identification 1: first visit 2: second visit OPE: operator identification A: operator A B: operator B TRIAL: gait trial identification number CYCLE: gait cycle identification number ANG: joint angle type fe: flexion–extension aa: abduction–adduction ie: internal–external rotation JOINT: assessed joint or body segment SIDE: body side R: right L: left PLANE: three-dimensional plane of motion sag: sagittal cor: coronal tra: transverse DEVICE: measurement device used to compute kinematic outcomes I: IMU-based system O: optoelectronic system GPS: Gait Profile Score (°) Stride time: stride duration (s) Stride length: stride length (m) Walking speed: walking speed (m/s) Percentage stance: stance phase duration (% of the gait cycle) Max: maximum joint angle throughout the gait cycle Min: minimum joint angle throughout the gait cycle ROM: range of motion throughout the gait cycle Mean: mean joint angle throughout the gait cycle STD: standard deviation throughout the gait cycle MaxStance / MaxSwing: maximum joint angle during the stance or swing phase MinStance / MinSwing: minimum joint angle during the stance or swing phase ROMStance / ROMSwing: range of motion during the stance or swing phase MeanStance / MeanSwing: mean joint angle during the stance or swing phase STDStance / STDSwing: standard deviation during the stance or swing phase Frame 1 to 101: time-normalized joint angle values (°) over the gait cycle (0–100%)