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The features point to the brain stem.
A normal MRI
is against established insult - but it does not rule out TIA
(Transient Ischemic Attacks).
A neurologic examination is necessary.
MRA (MRI Angiography
) to show the blood vessels may shed light - it is advisable to have it done.. (Some do Doppler study of of neck vessels (Carotid and Vertebral
) - but MRA will also show intra cranial vessels.
Wishing speedy recovery