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Table 4 Mean errors and standard deviations ([cm]) between the trochlea position computed via the socket-ball model and by the reconstruction done by the optical system (five individuals, three trials). Test points are spanned by θ=θ arm and ψ=ψ arm

From: A bi-articular model for scapular-humeral rhythm reconstruction through data from wearable sensors

θψ 10° 20° 30° 40° 50° 60° 70° 80°
20° 0.4±0.5 0.6±0.5 0.7±0.4 1.2±0.5 0.9±0.5 0.7±0.5 0.6±0.7 0.4±0.6
40° 0.8±0.6 1.1±0.7 1.2±0.5 1.2±0.5 1.2±0.4 1.1±0.6 0.8±0.6 0.6±0.4
60° 1.3±0.5 1.4±0.7 1.5±0.5 1.6±0.5 1.5±0.5 1.4±0.5 1.2±0.6 1.0±0.4
80° 2.2±1.0 2.5±0.5 2.9±0.5 3.0±0.8 2.8±0.7 2.7±0.8 2.3±0.4 2.1±0.6
100° 4.3±0.9 4.8±0.6 4.9±0.8 5.4±0.5 10.7±1.1 5.2±0.7 4.8±0.4 3.7±0.8
120° 10.3±0.7 10.3±1.0 10.6±1.2 11.5±1.1 11.3±0.9 11.0±0.6 9.8±0.9 9.2±0.7