Findings consistent with alterations in posterior cerebral circulation may include:

Alterations in posterior cerebral circulation primarily affect brain regions responsible for processing visual information and coordinating balance and spatial awareness. As a result, ataxia—which refers to a lack of voluntary coordination of muscle movements—and visual deficits are typical findings in this context.

Visual deficits may manifest as difficulties in visual perception, such as problems with recognizing objects, understanding spatial relations, or visual field cuts. Ataxia can result from disruptions in the cerebellum or other areas involved in motor control linked to the visual system.

The other options suggest symptoms that are more closely associated with other areas of circulation. Severe headache and nausea are often indicative of issues like increased intracranial pressure or other types of cerebral pathology rather than specifically pointing to alterations in the posterior circulation. Speech difficulties and paralysis typically arise from anterior circulation issues affecting the motor and language centers in the brain. Lastly, memory loss and confusion are more aligned with cerebral hemispheric dysfunction or complications associated with ischemia or stroke affecting areas such as the temporal or frontal lobes, rather than the posterior cerebral circulation itself.