Causes of Vertigo. Vertigo, or dizziness, usually results from a disorder in the peripheral vestibular system (i.e., structures of the inner ear). Dizziness also may occur as a result of a disorder in the central vestibular system (i.e., vestibular nerve, brainstem, and cerebellum).In some cases, the cause of vertigo is unknown.ertigo, or dizziness, usually results from a disorder in the peripheral vestibular system (i.e., structures of the inner ear). Dizziness also may occur as a result of a disorder in the central vestibular system (i.e., vestibular nerve, brainstem, and cerebellum).
The primary duty of the president of the United States is to make sure that all U.S. laws are carried out and that the federal government is run effectively. Although the president may not introduce new legislation-that's the duty of Congress-he does wield veto power over all bills that are approved by the legislature.
In the United States the presidency is headed by the president, who has many roles, such as: 1  Chief of State: The chief public representative of a country, who may also be the head of government. 2  Commander in Chief of the Armed Forces: Is the civilian commander of a nation's military forces.