UHBMES

Hey again! I am now testing what an additional post on the landing page looks like. This time, not only will I include text, but I will attempt to add a picture and see how it’s embedded. Observe.

The biomechanical model consists of 10 segments (head, neck, shoulder girdle, left upper arm, right upper arm, left lower arm, right lower arm, left hand, right hand, pelvis) whose local coordinate systems are used to calculate upper extremity motion. All joints are assumed to have fixed centers of rotation, for ease of calculation. The wrist joint is modeled as a universal (saddle) joint with two-degrees-of-freedom, where wrist movement occurs in flexion-extension and radio-ulnar deviation. In keeping with clinical convention, wrist movement is represented by movement between the hand and forearm segments, determined by a vector connecting the geometric wrist center and the calculated elbow center. The elbow joint is modeled as a rotating-hinge joint with two-degrees-of-freedom (constrained varus and valgus), with a single joint center in the distal humerus. Forearm pronation and supination are modeled as rotation about an axis connecting the elbow center and distal ulna. The shoulder joint is modeled as a ball and socket joint with three degrees-of-freedom, located in the center of the humeral head. Movement is calculated between the humerus and the trunk, and scapular contribution to shoulder motion is ignored