Definition : Electrogoniometers designed to measure angles along or around a particular plane. These goniometers may consist of a small-diameter flexible spring with plastic blocks on each end, a strain gauge mechanism housed inside the spring that changes electrical resistance proportionally to the change in angle between the longitudinal axes of the end blocks, an amplifier, and extension cables to connect to the electronic measuring unit. The end blocks are usually attached to the limb segments with double-sided adhesive tape. A number of different potentiometric single-axis goniometers are also available; they are designed to cause a potentiometer shaft to rotate proportionally to the joint angle being measured. Single-axis electrogoniometers are intended mainly to measure joint (e.g., knee, elbow) bending; dedicated instruments are available to assess finger and/or toe joint movement. They are used mainly by rheumatologists and physiotherapists.
Entry Terms : "Single-Axis Electrogoniometers"
UMDC code : 23776