https://link.springer.com/article/10.1007/s00381-017-3580-1
Original Paper
- First Online:
- 25 August 2017
Abstract
Purpose
Upper
limb assessments in children with hemiparesis rely on clinical
measurements, which despite standardization are prone to error.
Recently, 3D movement analysis using optoelectronic setups has been used
to measure upper limb movement, but generalization is hindered by time
and cost. Body worn inertial sensors may provide a simple,
cost-effective alternative.
Methods
We
instrumented a subset of 30 participants in a mirror therapy clinical
trial at baseline, post-treatment, and follow-up clinical assessments,
with wireless inertial sensors positioned on the arms and trunk to
monitor motion during reaching tasks.
Results
Inertial
sensor measurements distinguished paretic and non-paretic limbs with
significant differences (P < 0.01) in movement duration, power, range
of angular velocity, elevation, and smoothness (normalized jerk index
and spectral arc length). Inertial sensor measurements correlated with
functional clinical tests (Melbourne Assessment 2); movement duration
and complexity (Higuchi fractal dimension) showed moderate to strong
negative correlations with clinical measures of amplitude, accuracy, and
fluency.
Conclusion
Inertial
sensor measurements reliably identify paresis and correlate with
clinical measurements; they can therefore provide a complementary
dimension of assessment in clinical practice and during clinical trials
aimed at improving upper limb function.
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