Abstract: Systems, devices, methods, and software for measuring and quantifying a limb movement are disclosed. An electromagnetic field generator generates an electromagnetic field; a plurality of electromagnetic sensors, positionable inside of the electromagnetic field and at different locations on a limb, generate position and orientation data; an electromagnetic stylus positionable inside of the electromagnetic field generates position and orientation data when activated; a processor coupled to the plurality of electromagnetic sensors and the stylus receives the data generated by the sensors and the stylus and calculates an angular movement of the limb and translation of an appendage coupled to a joint; and a display coupled to the processor displays at least one of the calculated angular movement and translation.

Abstract: A noninvasive dynamic analysis system is provided, in which a measured and analyzed result in a manual test may be fed back to an examiner, in real-time, to allow quantitative and dynamic evaluation of the result. The noninvasive dynamic analysis system includes a transmitter for transmitting an electromagnetic wave or an electromagnetic signal, two receivers fixed to the thigh and the cruris of the human body and capable of receiving the electromagnetic wave transmitted by the transmitter, an electromagnetic measuring device for determining the positions and the orientations of the two receivers based on information from the receivers, and a processing device, such as a personal computer, for calculating and indicating 6 DOF of the knee joint, based on the positions and the orientations of the two receivers, from the electromagnetic measuring device. The two receivers may be fixed to the thigh and the cruris by using two braces.