How does the ear control the balance of the body?

More organs of the body are directly involved in
maintaining the balance: the eyes, the muscles, (or, more precisely, the muscles'
receptors) and, especially, the inner ear (vestibular system). They bring
the information that is processed at the cerebellum, in this way the posture of the
body being always maintained.

The body has balance and this
balance is under control if the body is aware of it's position in space. The first organ
that informs the brain about body's position in space is the
eye.

At each change of position of the body, the eyes send
a different image. Receptors, distributed throughout the body, send information
to the brain, about the state of tension of the muscles and about the position of
joints.

A large number of information is brought to the
brain via the ear.

In the inner ear, there
are found semicircular canals that contain a fluid called endolymph, which helps
to determine the movements of rotation, acceleration or inclination of the head.This is
why after a few spins, endolymph's flow is disturbed and we are feeling
dizzy.

The channels that transmit
information are arranged at right angles in the three planes. Receptors are stimulated
by endolymph's movements, that transmit nerve inflows which are reaching the brain via
the vestibular nerve. The brain analyzes the information and, in response, orders to
the muscles to permanently correct posture, through fine
motions.