Browsing by Author "Fontana, Heiliane de Brito"

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    Contribution of individual quadriceps muscles to knee joint mechanics
    (2019-03) Han, Seong-won; Sawatsky, Andrew; Fontana, Heiliane de Brito; Herzog, Walter
    Many attempts have been made to determine the contribution of individual muscles in an agonistic group to the mechanics of joints. However, previous approaches had the limitations that muscles often could not be controlled in a precise manner, that individual muscles in an agonistic group could not be activated individually, and that individual muscle contributions could not be measured in an actively contracting agonistic group. Here, we introduce a surgical approach that allows for controlled activation of individual muscles of an agonistic group. The approach is illustrated for the vastus lateralis (VL), vastus medialis (VM) and rectus femoris (RF) of the rabbit quadriceps femoris group. We provide exemplar results for potential applications of the approach, such as measuring the pressure distribution in the patellofemoral joint, and the torque–angle relationship of VL, VM and RF when activated individually and when the three muscles are activated simultaneously.
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    The mechanics of agonistic muscles
    (Journal of Biomechanics, 2018-09-05) Fontana, Heiliane de Brito; Han, Seong Won; Sawatsky, Andrew; Herzog, Walter
    In this study, we tested two assumptions that have been made in experimental studies on muscle mechanics: (i) that the torque-angle properties are similar among agonistic muscles crossing a joint, and (ii) that the sum of the torque capacity of individual muscles adds up to the torque capacity of the agonist group.
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    Proceedings of the 4th Rocky Mountain Muscle Symposium
    (2019-07-27) Joumaa, Venus; Hessel, Anthony; Nishikawa, Kiisa; Millard, Matthew; Han, Seong-won; Bell, Kaylyn; Leonard, Tim; Corr, David; Swank, Douglas; Corvelyn, Marlies; Sahani, Ridhi; Mazara, Nicole; Moo, Eng Kuan; Lieber, Rick; Kaya, Motoshi; Granzier, Henk; Oldshue, Ashley; Adkins, Amy; Loya, Amy; Boldt, Kevin; Desloovere, Kaat; Fukutani, Atsuki; Martino, Giovanni; De Beukelaer, Nathalie; Horslen, Brian; Agten, Anouk; Costamagna, Domiziana; Lee, Sabrina; Schwaner, Marie Janneke; Abbott, Emily; Binder-Markey, Benjamin; Siebert, Tobias; Lin, David; Fontana, Heiliane de Brito; Daley, Monica; Hahn, Daniel; Evangelidis, Pavlos; Knaus, Katherine; Smith, Ian; Deloovere, Kat; Kawakami, Yasuo; Hodson-Tole, Emma; Oliveira, Liliam; Ichinose, Hoshizora; Tillin, Neale; Raiteri, Brent; Seiberl, Wolfgang; Vaz, Marco; Cruz-Montecinos, Carlos; Griffiths, Robert; MacIntosh, Brian; Lourdes Rios, Jacqueline; Bossuyt, Fransiska
    Proceedings from the 4th Rocky Mountain Muscle Symposium, Canmore Nordic Centre, July 27-29, 2019