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. Author manuscript; available in PMC: 2010 Feb 23.
Published in final edited form as: J Mot Behav. 2007 Jul;39(4):276–290. doi: 10.3200/JMBR.39.4.276-290

FIGURE 1.

FIGURE 1

Schematics of the instrumented handle (A) and the computation of the moment arms of the normal forces (B). In B, w is the handle width (w = 76 mm); yi is the vertical coordinate of the index finger force application with respect to the sensor center; di is a projected vertical distance between the sensor centers of the index finger and thumb; and Yi is the vertical coordinate of the point of the index finger force application. Note that the lowercase yi designates the coordinate with respect to a sensor center, whereas the uppercase Y designates a coordinate in the handle-fixed reference system. F. = finger.