What are the signs and symptoms of dorsal midbrain syndrome in vertebrobasilar stroke?

Updated: Aug 09, 2021
  • Author: Vladimir Kaye, MD; Chief Editor: Stephen Kishner, MD, MHA  more...
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This syndrome is due to a lesion in the midbrain tegmentum resulting from occlusion of paramedian branches of the basilar artery, the PCA, or both.

The patient demonstrates ipsilateral oculomotor palsy, ptosis, and mydriasis (as in Weber syndrome), along with the contralateral involuntary movements, such as those of intention tremor, ataxia, or chorea (due to the involvement of the red nucleus).

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