Illustration of the model and local coordinate systems. Valeriya Gritsenko Russell L. Hardesty Mathew T. Boots Sergiy Yakovenko 10.1371/journal.pone.0164050.g001 https://plos.figshare.com/articles/figure/Illustration_of_the_model_and_local_coordinate_systems_/4029612 <p>(A) and (B) Musculotendinous paths from anatomical origins to insertions on the skeleton are illustrated with red lines with selected labels. (C) Coordinate systems for each segment are illustrated with the color-coded cartesian exes in red, yellow, and green for x-, y- and z-axes respectively. Euler angles around these axes represent joint angles. The illustrated posture of the model corresponds to all joint angels at zero. The local coordinate systems are shown only for thumb and index finger. The coordinate systems of the other digits follow the orientation of the coordinate systems for the index finger.</p> 2016-10-13 17:30:03 muscle groups musculoskeletal model muscle lengths Human Arm Neural control muscle actions musculoskeletal anatomy inductive data-driven study musculoskeletal system grouping muscles Biomechanical Constraints Motor Primitives Derived interaction Muscle lengths movement complexity problem Musculoskeletal Anatomy results support