| Anterior cerebral artery |
Contralateral hemiparesis and sensory loss, lower extremity > upper |
| Middle cerebral artery |
Contralateral hemiparesis and sensory loss, upper extremity > lower Contralateral homonymous hemianopia Aphasia |
| Posterior cerebral artery |
Contralateral homonymous hemianopia with macular sparing Visual agnosia |
| Weber's syndrome (branches of the posterior cerebral artery that supply the midbrain) |
Ipsilateral CN III palsy Contralateral weakness of upper and lower extremity |
| Posterior inferior cerebellar artery (lateral medullary syndrome, Wallenberg syndrome) |
Ipsilateral: facial pain and temperature loss Contralateral: limb/torso pain and temperature loss Ataxia, nystagmus |
| Anterior inferior cerebellar artery (lateral pontine syndrome) |
Symptoms are similar to Wallenberg's (see above), but: Ipsilateral: facial paralysis and deafness |
| Retinal/ophthalmic artery |
Amaurosis fugax |
| Basilar artery |
'Locked-in' syndrome |