NeuroCom International

UNILATERAL STANCE (US)


Description
US Report
Functional Implications

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Description

US PhotoThe US quantifies postural sway velocity with the patient standing on either the right or left foot on the forceplate, with eyes open and with eyes closed. The length of each trial is ten seconds.

The US test is highly sensitive, but not specific because a large number of independent factors can impact performance. A partial list of these factors includes lower extremity strength and weight bearing control, sensory balance control, movement strategies, and prior practice with the task.

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US Comprehensive Report

  1. The COG traces for each trial are shown at the top of the report.
  2. Mean Cog Sway Velocity displays COG stability while the patient stood independently on each leg with eyes open and with eyes closed. The center bar graph displays the percentage difference score with the bar pointing in the direction of the limb with the better performance.
  3. The shaded area on each graphic represents performance outside of the normative data range. Green bars indicate performance within the normal range; red bars indicate performance outside the normal range. A numerical value is given at the top of each bar.

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Functional Implications

Normal individuals have significantly more sway standing on one foot versus two, and even more sway on one foot with eyes closed. Patients who become unstable may have difficulty using visual or somatosensory information for balance control, and/or may have musculoskeletal problems that make it difficult to compensate. Functional consequences are significant for performance of activities that require single-leg balance, such as donning pants or hosiery, ascending or descending elevations, or navigating narrow support surfaces (ladders, scaffolding, etc.).

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