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Figure 1. High activation joint torques are required to produce pinch force (Fpinch) of 30 N. When total finger length (ltotal) is 67 mm and distal finger length (ldist) is 37 mm, joint torque must be 2,010 Nmm in metacarpophalangeal joint (MMCP) and 1,110 Nmm in proximal interphalangeal joint (MPIP). Smit G, Plettenburg DH, van der Helm FC. Design and evaluation of two different finger concepts for body-powered prosthetic hand. J Rehabil Res Dev. 2013; 50(9):1253–66. http://dx.doi.org/10.1682/JRRD.2012.12.0223 ResearcherID/ORCID: Gerwin Smit, MSc, PhD: B-9994-2012; Dick H. Plettenburg, MSc, PhD: C-1078-2012; Frans C. T. van der Helm, MSc, PhD: C-3321-2011