ur alright,
Dizziness, vertigo, and motion sickness all relate to the sense
of balance and equilibrium. Researchers in space and aeronautical
medicine call this sense spatial orientation, because it tells the
brain where the body is "in space:" what direction it is pointing,
what direction it is moving, and if it is turning or standing
still. Your sense of balance is maintained by a complex interaction
of the following parts of the nervous system:
The symptoms of motion sickness and dizziness appear when the
central nervous system receives conflicting messages from the other
four systems.
For example, suppose you are riding through a storm, and your
airplane is being tossed about by air turbulence. But your eyes do
not detect all this motion because all you see is the inside of the
airplane. Then your brain receives messages that do not match with
each other. You might become "air sick."
Or suppose you are sitting in the back seat of a moving car
reading a book. Your inner ears and skin receptors will detect the
motion of your travel, but your eyes see only the pages of your
book. You could become "car sick."
Or, to use a true medical condition as an example, suppose you
suffer inner ear damage on only one side from a head injury or an
infection. The damaged inner ear does not send the same signals as
the healthy ear. This gives conflicting signals to the brain about
the sensation of rotation, and you could suffer a sense of
spinning, vertigo, and nausea.
