الفهرس 
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Abstract
Balance is fundamental to our daily activities. The vestibular system, vision and proprioception are the main structures involved in this process. Although balance is an integrated sense, a key component of its function is derived from vestibular system. Greater than 80% of balance problems are inner ear related according to Shepard (2001). Vertigo and dizziness are common complaints encountered in clinical practice. An illusion of movement (vertigo), most likely, indicates a dysfunction within the vestibular system. While sensation of rotatory movement together with spontaneous nystagmus suggests a lesion involving the semicircular canals, an illusion of linear movement indicates a disturbance of otolith organs. Peripheral vestibular disorders are most common etiologies for dizziness and vertigo (35-55%). The most common causes of peripheral vestibular disorders are benign paroxysmal positional vertigo (BPPV), vestibular neuritis (VN) and Meniere’s disease (MD). Accurate evaluation and diagnosis of peripheral vestibular disorders is the key for the proper management of these cases.