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Table 2 Summary of minimal and maximal forces/aperturesa allowed for clothespins used in the PIN test

From: The clinical relevance of advanced artificial feedback in the control of a multi-functional myoelectric prosthesis

Pin color Min aperture [%] Max aperture [%] Aperture window size [%] Min force [%] Max force [%] Force window size [%]
Yellow 33 71 38 7 15 8
Red 33 66 33 13 23 10
Green 33 57 24 23 32 9
Black 33 57 24 35 43 8
  1. aThe values are relative to the prosthesis’ maximal grip force (70 N) and the clothespins’ maximal aperture (3.2 cm)