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it's important to understand what is meant by using the right hand rule to determine the sign - because the sign will be dependent on the model definition (x along the mediolateral axis or along the ap or along the axial - or x to the right or the left, etc).\\ \\ this is just a sample to try and walk you through understanding the signal convention for this specific example. in this example, we're looking at the knee angle, where x is pointing to the right, y is anterior and z is axial. below is a posterior image of the subject and segment coordinate systems.\\ \\ remember when trying to determine the right hand rule - it's typically easiest to imagine the coordinate system on yourself and align your right thumb with where the coordinate system would be, then curl your fingers to determine the positive direction. | righthandrule_fullbody.png| ==== for the x axis (mediolateral): ==== | righthandrule_rightx.png | righthandrule_leftx.png | ==== for the y axis (anterior/posterior): ==== | righthandrule_righty.png | righthandrule_lefty.png | ==== for the z axis (axial): ==== | righthandrule_rightz.png | righthandrule_leftz.png | }}}}}}}}}}}}}}
