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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Exp Brain Res. 2011 Nov 10;216(2):249–261. doi: 10.1007/s00221-011-2923-5

Figure 2.

Figure 2

Normal forces (Fn) of the thumb (TH) and vitual finger (VF) exerted on the handle under different load conditions (0.1, 0.2, and 0.3 kg) and different lever arms (black bars: 0.08 m; white bars: 0.16 m; gray bars: 0.24 m). The averaged data across trials and subjects are presented with standard error bars. Both VF and thumb normal forces scaled with the load and lever arm.