**5.1 Balance error scoring system (BESS)**

The Balance Error Scoring System (BESS) is an objective measure of assessing static postural stability. It is an assessment that verifies three positions in different surfaces (firm and foam). The individual sustains the posture (feet together, tandem stance, or single leg stance) with the hands on their hips and without vision (eyes closed). During 20 seconds in each position, an examiner counts errors that include: to open the eyes, to remove hands from the hips, to lower the raised foot during single leg stance, to lift the heel or forefoot, or to remain out of the test position for more than five seconds. The advantages of the assessment are good reliability, low cost effective and easy to administer [20].

**Figure 2.** *Equipment for computerized Posturography. Courtesy: Interacoustics and Bertec.*
