Table 2. Ratio between the module weights Associated To the area barycenterS in prone versus neutral position.

		Weight ratio (prone/neutral)median (25%–75%)
Segment	Movement	Module
		1	2	3
hand	flex/ext	1.4 (1.3–1.7)	0.5 (0.3–0.8)	0.8 (0.4–2.0)
	add/abd	0.7 (0.6–1.1)	1.9 (0.9–3.5)	0.7 (0.4–1.2)
all fingers	flex/ext	0.9 (0.5–1.4)	1.1 (0.8–1.6)	1.0 (0.7–1.4)