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DETAILED EXPLANATION OF VARIABLE
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TEMPORAL FEATURES OF GAIT
Cycle duration (s)
Cycle velcity (cm/s)
Stance duration (s)
Swing duration (s)
Relative stance duration (% of cycle duration)
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LIMB ENDPOINT TRAJECTORIES
Stride length (cm)
Step length (cm)
3D limb endpoint path length (cm)
Maximal backward position with respect to pelvis (cm)
Minimum forward position with respect to pelvis (cm)
Step height (cm)
Maximal speed during swing (cm/s)
Relative timing of max velocity during swing
Acceleration at swing onset (cm/s^2)
Endpoint velocity (cm/s)
Orientation of the velocity vector at swing onset (deg)
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STABILITY
Double stance duration (s)
Posititioning of the foot at stance onset with respect to pelvis (cm)
Stance width (cm)
Pelvis maximum lateral movement (deg)
Pelvis minimum lateral movement (deg)
pelvis lateral movement amplitude (deg)
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Variability of saggital trunk oscillation
Variability in velocity of saggital trunk oscillation
Varibility of vertical mid-point hip oscillation
Variability of medio-lateral mid-point hip oscillation
Variability of medio-lateral hip rotations
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Forward motion of body center of mass (cm)
Medio-lateral motion of body center of mass (cm)
Vertical motion of body center of mass (cm)
3D motion of body center of mass (cm)
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JOINT ANGLES AND SEGMENTAL OSCILLATIONS
Crest oscillations (deg)
Thigh oscillations (deg)
Base of support
Trunk and pelvic
position and
oscillations
Displacement of body
mid-point
forward oscillation of
limb segments
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Shank oscillations (deg)
Foot oscillations (deg)
Whole limb oscillations (deg)
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Crest oscillations (deg)
Thigh oscillations (deg)
Shank oscillations (deg)
Foot oscillations (deg)
Whole limb oscillations (deg)
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Hip joint (deg)
Knee joint (deg)
Ankle joint (deg)
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Whole limb abduction (deg)
Foot abduction (deg)
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Hip joint (deg)
Knee joint (deg)
Ankle joint (deg)
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Whole limb abduction (deg)
Foot adduction (deg)
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Crest oscillations (deg)
Thigh oscillations (deg)
Shank oscillations (deg)
Foot oscillations (deg)
Whole limb oscillations (deg)
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Hip joint (deg)
Knee joint (deg)
Ankle joint (deg)
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Whole limb medio-lateral oscillation (deg)
Foot abduction/adduction (deg)
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VELOCITY
Whole limb oscillation velocity (deg/s)
Hip joint angle oscillation velocity (deg/s)
Knee joint angle oscillation velocity (deg/s)
Ankle joint angle oscillatino velocity (deg/s)
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Whole limb oscillation velocity (deg/s)
Hip joint angle oscillation velocity (deg/s)
Knee joint angle oscillation velocity (deg/s)
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backward oscillation
of limb segments
Extension of joint
angles
Abduction
Flexion of joint angles
Adduction
Amplitude of
segmental and joint
oscillations (Max-min)
Minimum angle
velocity (deg/s)
Maximum angle
velocity (deg/s)
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Ankle joint angle oscillatino velocity (deg/s)
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Whole limb oscillation velocity (deg/s)
Hip joint angle oscillation velocity (deg/s)
Knee joint angle oscillation velocity (deg/s)
Ankle joint angle oscillatino velocity (deg/s)
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COORDINATION
Degree of linear coupling between hindlimb elevation angles
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Temporal coupling between crest and thigh oscillation
Temporal coupling between thigh and leg oscillation
Temporal couling between leg and foot oscillation
FFT decomposition
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Correlation between crest and thigh oscillation
Correlation between thigh and leg oscillation
Correlation between leg and foot oscillation
Correlation between hip and knee oscillation
Correlation between knee and ankle oscillation
Cross-correlation
between segments
Relative coupling
between segments
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Temporal lag between backward positions of crest and thigh oscillations
Temporal lag between forward positions of crest and thigh oscillations
Temporal lag between backward positions of thigh and leg oscillations
Temporal lag between forward positions of the thigh and leg oscillations
Temporal lag between backward positions of leg and foot oscillations
Temporal lag between forward positions of leg and foot oscillations
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Correlation between whole hindlimb oscillations
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Amplitude of angle
velocity (Max - Min)
deg/s
PC analysis
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