| Vertigo and
nystagmus |
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| • | The vestibular
system has a tonic signal, |
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| changes of which
are interpreted as head |
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| motion. |
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| • | Anything that
deranges that signal causes |
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| vertigo, a perception of head motion when |
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| the head is
still. |
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| • | This may be
associated with visuovestibular |
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| conflict, nausea,
and vomiting. |
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