Functional assessment of stretch hyperreflexia in children with cerebral palsy using treadmill perturbations

Table 2 Perturbation characteristics

	I1	I2	I3	ANOVA	Posthoc
Peak Δ v (ms⁻¹)	0.53 ± 0.01	0.80 ± 0.01	1.03 ± 0.01	< 0.001	All
Peak Δ vrel (%)	74.49 ± 31.32	111.60 ± 47.31	144.15 ± 60.99	< 0.001	All
Peak Δ a (ms⁻²)	18.08 ± 1.01	18.41 ± 1.37	18.34 ± 1.30	0.505	All
Time to peak v (ms)	72.67 ± 11.04	92.81 ± 15.32	103.75 ± 15.34	< 0.001	All
Time to peak vrel (%)	10.32 ± 0.75	13.24 ± 0.88	15.56 ± 1.04	< 0.001	All
Duration (ms)	143.71 ± 22.07	181.27 ± 29.40	206.69 ± 30.60	< 0.001	All
Duration rel (%)	20.37 ± 1.44	25.93 ± 1.78	30.95 ± 2.03	< 0.001	All
Start (ms)	95.81 ± 51.93	80.34 ± 18.40	77.92 ± 18.63	0.063	–
Start rel (%)	11.64 ± 2.35	11.88 ± 2.72	11.94 ± 2.58	0.877	–
Start rel TD (%)	12.02 ± 1.48	12.11 ± 1.57	11.88 ± 1.53	0.661	–
Start rel CP (%)	11.38 ± 3.61	11.73 ± 3.98	11.99 ± 3.32	0.626	–
Peak Δ Ankle angle (°)	1.99 ± 0.69	3.60 ± 0.94	4.89 ± 1.49	< 0.001	All
Peak Δ Ankle ω (°s⁻¹)	45.65 ± 14.65	62.21 ± 16.61	77.83 ± 24.00	< 0.001	All

Spatiotemporal parameters (Time to peak v, perturbation duration and perturbation start) are expressed in absolute values as well as relative to the gait cycle (rel). Mean ± standard deviations are presented. Δ v = difference in treadmill velocity, Δvrel = difference in treadmill velocity relative to participant’s belt velocity, a = treadmill acceleration, ω = angular velocity. Significant values are expressed in bold. All posthoc testing revealed significant differences between all conditions (p < 0.05)

ISSN: 1743-0003