Balance Analysis System Through Biaxial Rotation Force Platform

Study Overview
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Brief Summary
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This study developed a system for studying an individual's postural balance in an upright position on a force platform with controlled movement of 2-axis rotation (transverse and anteroposterior), by analyzing lower limb muscle activation and data from Pressure Center of displacement.

Detailed Description
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The use of rotating force platforms has proven to be an important resource in the study of postural balance and motor control. Platforms composed of two force plates allow the analysis of the load relationship between the feet and the study of the coordination of the lower body segments in postural control. Center of pressure displacement data during perturbations generated by platform rotation allow the study of dynamic postural balance. However, devices that meet these characteristics are not common and have limitations on amplitude or speed of rotation. Thus, a force platform composed of two plates was developed, capable of collecting data for the calculation of the parameters of the center of pressure, differentiating each foot, with a computerized system to control amplitude and speed of rotation in the mid-lateral and anteroposterior axes. A new version of embedded and supervisory systems that control the device, collect and process the created data has also been developed. For platform functionality tests, volunteers were divided into three groups of 15 individuals: Group 1 (G1): women aged 18 to 40 years; Group 2 (G2): women aged 40 to 60 years; Group 3 (G3): women over 60 years old.

Official Title
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Development of Balance Analysis System Through Biaxial Rotation Force Platform Posturography Combined With Electromyography

Conditions
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Balancing Interference

Intervention / Treatment
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* Device: Force platform


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Women Ages 18 to 80 years Asymptomatic Resident of the city of mogi das cruzes. You will have to sign the consent form Exclusion Criteria: History of dizziness or dizziness crisis not explained in the last year; Any musculoskeletal or neurological disorders; Significant pain that limits daily functions; Known uncorrected vestibular problems. Fall History

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Interventional Model Description: Biaxial rotation force platform combined with electromyography
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Balance<br>Volunteers aged from 18 years to over 60 years were selected without compromise. The tests were performed in a single session lasting 1 hour where the volunteers will do the tests on the force platform. | Device: Force platform<br>* In order to volunteers to be selected for collection a recruitment test will be taken, the volunteer will have to stand on one foot for 5 seconds without additional support. So that the volunteer can go to the balance test on the force platform, he will be dressed with safety equipment (harness), and will also have the attachment of the electrodes.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Center of pressure offset | With the volunteer allocated on the platform in an upright position with the malleoli aligned with the central axis of rotation of the platform will be collected the displacement of the center of pressure. Unit of measure: millimeters (mm). | 1 hour | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Electromyographic signal | Electromyographic signal of the anterior tibial and gastrocnemius muscle. unit of measurement in microvolts (µV). | 1 hour | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Center of pressure, Dynamic postural balance, Force platform, Posturography, Electromyography