Instrumented Postural Sway Plugin
The ISWAY test results in 42 primary measures of postural sway, including: sway area, velocity, frequency and jerkiness.
>> Download the full list of measurement
The ISWAY plugin also comes with a biofeedback functionality where the subject’s center of mass is displayed in real-time (~30ms latency) used for biofeedback training.
Developed by Dr. Shumway-Cook and Dr. Horak (Shumway-Cook, A. and Horak, F.B. Assessing the influence of sensory interaction on balance. Phys. Ther., 66: 15481550, 1986), the CTSIB protocol helps determine which sensory system (visual,
somatosensory, or vestibular) a subject relies on to maintain balance. APDM has further bolstered the quality of the test by instrumenting it with our Mobility Lab™ software. Test conditions include:
1) Eyes open, hard surface
2) Eyes closed, hard surface
3) Eyes open, foam surface
4) Eyes closed, foam surface
The subject begins by standing with his/her arms crossed in a comfortable manor, and is looking at the picture on the wall. The test administer will then simply start the test, wait for 30 seconds until the test is completed. Different methods of standing may be used at the guidance of the administer, such as eyes closed, on a foam pad, one-legged, etc (see CTSIB). The administer can make note of the type of stance used within Mobility Lab™ for future reference.
For more technical information about the ISWAY plugin, or any other APDM product, please contact us at,