CAUSES OF INJURY
Aneurysm of this artery can be caused by…
CLINICAL PRESENTATION OF INJURY
Aneurysm of this artery can compress the oculomotor nerve (CN III) due to very close proximity (this vessel is especially susceptible to this happening). Given also that pupilloconstrictor fibers lie superficially on this nerve, this type of compression injury can manifest as:
- A tonically dilated pupil, and a deficient pupillary response to both direct and consensual stimulation (shining light in either eye will not cause the affected eye to constrict).
- Diplopia as the aneurysm enlarges and compresses the nerves that supply the medial rectus muscle.
Page updated: 06.20.2016