In vivo forces generated by finger flexor muscles do not depend on the rate of fingertip loading during an isometric task

Motor control theories improve biomechanical model of the hand for finger pressing tasks

“…Comparisons of the model B estimations with direct in-vivo values indicate that Model B gives values close to Kursa et al (2005) for the tension of the Index FDP (model B: 2.5, Kursa: 2.4) and with Schuind et al (1992) and Dennerlein et al (1998) for the tension of the Index FDS (Schuind: 1.7, model B: 2.6, Dennerlein: 3.3).…”

“…We retain the models of Chao et al (1989), Li et al (2001), Harding et al (1993), Weightman and Amis (1982), Fowler and Nicol (2000), Chao and An (1978) for partial comparisons since they have considered one finger independently (the Index or the Middle). Finally, to increase the level of confidence of our estimations, we use in-vivo measures available in the literature for the Index finger (Dennerlein et al, 1998;Schuind et al, 1992;Kursa et al, 2005).…”

Using EMG data to constrain optimization procedure improves finger tendon tension estimations during static fingertip force production

“…Nevertheless, numerical optimization procedures present major limitations since they provide solutions which do not correspond to the muscle activation patterns identified by electromyography (EMG) (Ait-Haddou et al, 2004;Challis and Kerwin, 1993;Jinha et al, 2006;Raikova and Prilutsky, 2001). Particularly, optimization procedures do not take into account that subjects can use different muscle force patterns to produce a similar external fingertip force (Kursa et al, 2006). Moreover, optimization procedures could fail to predict the significant antagonist muscle tensions (Challis, 1997).…”

The Effects of Hand Function on the Angle of Holding a Smartphone

“…The tendon forces from the extrinsic muscles of the hand have been measured directly by instrumenting the tendon [12].…”