10.1371/journal.pone.0009728.g002 Victor Frak Victor Frak Tatjana Nazir Tatjana Nazir Michel Goyette Michel Goyette Henri Cohen Henri Cohen Marc Jeannerod Marc Jeannerod Functioning of the instrumented cylinder. Public Library of Science 2013 instrumented 2013-02-21 02:17:29 Figure https://plos.figshare.com/articles/figure/_Functioning_of_the_instrumented_cylinder_/529481 <p><b>A.</b> The apparatus is designed to measure the orientation (θ) and vertical location (<i>x</i>) of the applied force (<i>P</i>) by either the index or thumb while exerting a grip force. These parameters are computed from outputs of a F/T sensor (with axes <i>X</i>, <i>Y</i> and <i>Z</i>) embedded in the two half-cylinders using two T-adaptors. <b>B</b>. The participants were asked to lift the cylinder with the thumb and index fingers of the right hand and hold it at about 5 cm above the table.</p>