Postural control strategy after incomplete spinal cord injury: effect of sensory inputs on trunk–leg movement coordination

Table 2 Balance biomarkers

Outcome measure	Nomenclature	Type
Root-mean-square distance	RDIST	COP Time-domain distance measures
Mean distance	MDIST
Total excursion	TOTEX
Mean velocity	MVELO
95% Confidence ellipse area	Area-CE	COP area measure
Sway area	Area-SW	COP Time-domain hybrid measures
Mean frequency	MFREQ	COP Time-domain hybrid measures
Median frequency	MEDFREQ	COP Frequency-domain measures
Centroid frequency	CFREQ
Frequency dispersion	FREQD
Sway jerkiness	JERK	COM acceleration-based measures
Root-mean-square acceleration	RMS-ACC
Centroid frequency	CF-ACC
Cancellation-index	CI	Trunk–leg acceleration pattern coordination
Magnitude-squared coherence	MSC	Trunk–leg acceleration pattern coordination

As conventional outcome measures, a total of ten center-of-pressure (COP) measures were calculated according to [33]. In addition, three center-of-mass (COM) acceleration-based measures were used based on [19]. For movement coordination, we used cancellation index based on [30] and Magnitude-Squared Coherence (MSC) between trunk and leg segments

ISSN: 1743-0003