The accelerometer mouse places the cursor at the intersection of two lines. (a) Moving the inertial sensor (in this case, accelerometer) on the right hand or elbow rotates line B about the screen’s bottom right corner (i.e., point B). (b) Moving the inertial sensor (again, accelerometer) on the left hand or elbow rotates line A about the screen’s bottom left corner (i.e., point A). Images from [19].