
What Causes Dizziness While Sitting Or Standing?

Student Question: just interested in what potential causes there may be for these symptoms? I am assuming the vestibule is affected due to the lost of balance and tinnitus, there is nystagmus so could be a nerve problem CN III, IV, or IV or an oculomotor muscle problem, or patient is drunk (unlikely). Thank you for your assistance. This will be my last case study question for a while.
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Detailed Answer:
Hello! Thank you for coming to HCM for your questions.
Now the first thing is to look for signs of central vertigo, meaning a careful exam of especially cranial nerves, gait and coordination. A better description of nystagmus is necessary, when looking to one side or every direction, vertical, horizontal beating, rotating component etc.
Now judging from only what you say I would say this is most peripheral vertigo, perhaps a case of benign positional paroxysmal vertigo.
Nystagmus is present in vestibular disease as well, as well as veering on the side of the affected ear, so not necessarily central. If no ocular movement limitation no need to suspect oculomotor nuclei involvement, nystagmus on both eyes if central would indicate cerebellar or vestibular nuclei involvement (from MS, cerebellopontine angle tumor, stroke).
I remain at your disposal for further questions.

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