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

θ∖ψ	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