The design and construction of an electrogoniometer for measuring angular displacements of the hip is discussed. Data from the goniometer are recorded on magnetic tape and are processed and printed out in graphical format by mini-computer. Sample results are presented for normal and arthritic subjects involved in a number of activities, namely level walking, climbing and descending stairs, and sitting and rising from a chair. It is intended that the goniometer be used to provide prognostic and therapeutic guidelines in the clinical environment.
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